Peritonsillar Abscess (Quinsy)

Topic Overview

Summary

Peritonsillar abscess (PTA), also known as quinsy, is a collection of pus between the tonsillar capsule and the superior pharyngeal constrictor muscle in the peritonsillar space. It represents the most common deep neck space infection in adults and adolescents, typically arising as a complication of acute bacterial tonsillitis or pharyngitis. [1] The condition is characterized by severe unilateral sore throat, trismus (limited mouth opening), "hot potato" or muffled voice, and ipsilateral tonsillar swelling with contralateral uvular deviation. PTA is a true ENT emergency requiring prompt recognition, drainage (via needle aspiration or incision and drainage), and appropriate antibiotic therapy to prevent potentially life-threatening complications including airway obstruction, parapharyngeal extension, and Lemierre syndrome (septic thrombophlebitis of the internal jugular vein). [2,3]

Key Facts

• Anatomical Location: Abscess forms in the peritonsillar space, bounded by the tonsillar capsule medially and the superior pharyngeal constrictor muscle laterally
• Peak Incidence: Young adults aged 15-35 years, with annual incidence approximately 30-40 per 100,000 population [4]
• Classic Triad: Severe unilateral sore throat, trismus, and ipsilateral tonsillar swelling with "hot potato" voice
• Pathogenesis: Usually follows acute tonsillitis; infection spreads from tonsil through its capsule into peritonsillar space, or originates in Weber's glands (minor salivary glands)
• Microbiology: Polymicrobial; Group A Streptococcus (Streptococcus pyogenes) most common aerobe, with anaerobes including Fusobacterium necrophorum, Prevotella, and Peptostreptococcus species [5]
• Diagnosis: Primarily clinical based on characteristic examination findings; imaging (CT with contrast) reserved for uncertain cases or suspected complications
• Treatment: Drainage (needle aspiration or incision and drainage) plus IV antibiotics; immediate tonsillectomy ("quinsy tonsillectomy") for selected cases
• Complications: Airway obstruction, parapharyngeal/retropharyngeal spread, Lemierre syndrome, carotid artery erosion (rare), aspiration pneumonia, sepsis
• Recurrence: 10-15% recurrence rate if tonsils retained; interval or immediate tonsillectomy reduces recurrence risk substantially

Clinical Pearls

Trismus in severe sore throat = think peritonsillar abscess
Trismus results from irritation and spasm of the pterygoid muscles adjacent to the inflamed peritonsillar space

Uvula deviation AWAY from the affected side
The swollen peritonsillar mass pushes the uvula toward the contralateral side—a key examination finding

"Hot potato voice" = muffled quality
Pharyngeal edema prevents normal resonance, producing characteristic muffled or "thick" speech

Absence of trismus does NOT exclude PTA
Early-stage or smaller abscesses may present without significant trismus; maintain clinical suspicion with unilateral tonsillar swelling

Beware bilateral tonsillar swelling
Bilateral presentations are rare in PTA; consider infectious mononucleosis, lymphoma, or other systemic causes

Immediate ENT involvement if airway compromise
Stridor, respiratory distress, or inability to swallow secretions mandates urgent senior ENT assessment and possible airway intervention

Why This Matters Clinically

Peritonsillar abscess is the most common deep neck infection presenting to emergency departments and ENT services. Early recognition and appropriate drainage are curative for most patients, providing rapid symptom relief and preventing potentially catastrophic complications. Delayed diagnosis or treatment can lead to deep neck space extension (parapharyngeal, retropharyngeal spaces), airway obstruction requiring emergency airway management, and Lemierre syndrome—a rare but life-threatening complication involving septic thrombophlebitis of the internal jugular vein with potential septic emboli to lungs and other organs. Prompt diagnosis, drainage, and antibiotic therapy prevent these complications and reduce hospital stay duration. Additionally, understanding recurrence risk (10-15%) and the role of interval or immediate tonsillectomy allows appropriate counseling and follow-up planning. For postgraduate examinations (MRCP Part 2, ENT exams), PTA represents a high-yield topic encompassing emergency assessment, procedural skills (aspiration technique), antibiotic selection, and recognition of red flag complications.

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Visual Summary

Visual assets to be added:

• Peritonsillar space anatomy diagram (coronal and axial cross-sections)
• Clinical photograph demonstrating uvula deviation and asymmetric tonsillar swelling
• Needle aspiration technique (landmarks and safe approach)
• CT imaging showing peritonsillar abscess with peritonsillar space enhancement
• Management algorithm: drainage decision tree and antibiotic selection
• Complication pathway: local spread to parapharyngeal/retropharyngeal spaces and Lemierre syndrome

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Epidemiology

Incidence and Prevalence

Peritonsillar abscess is the most common deep neck space infection in adolescents and adults, with an annual incidence of approximately 30-40 cases per 100,000 population in developed countries. [4] Recent epidemiological data from Greece documented PTA as a leading cause of ENT emergency presentations, particularly in the post-pandemic era. [6] In the United Kingdom and United States, PTA accounts for approximately 45,000-50,000 emergency department visits annually. Most cases are sporadic, though small clusters may occur during peak tonsillitis seasons (winter and early spring).

Age and Sex Distribution

Peak Age: 15-35 years
Young adults represent the predominant age group, with peak incidence in the second and third decades of life. PTA is uncommon in children under 5 years (likely due to incomplete development of peritonsillar space) and less frequent in older adults over 60 years.

Sex Distribution:
Historically described as equal sex distribution, though some contemporary series report slight male predominance (male:female ratio approximately 1.2-1.5:1). This difference may relate to higher smoking rates in males, a recognized risk factor for PTA. [7]

Risk Factors

Established Risk Factors

Emerging Risk Factors

Recent evidence suggests metabolic comorbidities, particularly diabetes and hypertension, may influence severity and progression of oropharyngeal infections including PTA. [9] Poor dental status has been identified as an independent risk factor for both development and severity of peritonsillar and cervical infections. [8]

Geographic and Temporal Variation

PTA demonstrates seasonal variation mirroring acute tonsillitis epidemiology, with higher incidence during winter months (December-March) in temperate climates. No significant racial or ethnic predisposition has been identified. Socioeconomic factors influencing access to primary care and antibiotic use may affect PTA incidence indirectly, though robust epidemiological data are limited.

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Pathophysiology

Anatomical Considerations

The peritonsillar space is a potential space bounded:

• Medially: Tonsillar capsule (fibrous covering of palatine tonsil)
• Laterally: Superior pharyngeal constrictor muscle
• Superiorly: Soft palate and tonsillar fossa roof
• Inferiorly: Tongue base

This space contains loose areolar tissue and minor salivary glands (Weber's glands), making it susceptible to abscess formation when infection breaches the tonsillar capsule or originates primarily in Weber's glands.

Adjacent to the peritonsillar space lie critical structures:

• Internal carotid artery: Approximately 2.5 cm posterolateral to the tonsillar fossa (relevant to drainage safety) [10]
• Parapharyngeal space: Lateral to superior constrictor; conduit for deep neck space spread
• Retropharyngeal space: Posterior; potential route for mediastinal extension

Pathogenesis: Two Proposed Mechanisms

1. Progression from Acute Tonsillitis (Classical Theory)

The traditional model posits PTA as a complication of acute bacterial tonsillitis:

1. Acute tonsillitis develops (typically Group A Streptococcus)
2. Infection spreads through tonsillar capsule into peritonsillar space
3. Initial peritonsillar cellulitis (phlegmon) forms
4. Abscess formation occurs as pus accumulates in the confined space
5. Abscess expands, causing mass effect (uvular deviation, trismus from pterygoid irritation)

This mechanism accounts for approximately 80% of cases and explains why most PTA patients have preceding sore throat history.

2. Primary Weber's Gland Infection (Alternative Theory)

An alternative hypothesis, supported by microbiological and anatomical studies, suggests some PTAs originate from primary infection of Weber's glands (minor salivary glands) within the peritonsillar space, without antecedent tonsillitis. [11] This explains:

• Cases without preceding sore throat (~10-20%)
• Polymicrobial nature (oral anaerobes from salivary gland origin)
• Potential for recurrence despite adequate initial treatment

Microbiology: Polymicrobial Nature

PTA is predominantly a polymicrobial infection, typically involving both aerobic and anaerobic organisms. [5]

Aerobic Organisms

Anaerobic Organisms

Recent next-generation sequencing studies have revealed even greater microbial diversity, including previously uncultured organisms, emphasizing the polymicrobial complexity of PTA. [5]

Complications: Pathways of Spread

Local Extension

1. Parapharyngeal space: Lateral spread through superior constrictor → parapharyngeal abscess
2. Retropharyngeal space: Posterior spread → retropharyngeal abscess → potential mediastinitis
3. Submandibular/sublingual spaces: Inferior spread → Ludwig's angina (rare)
4. Airway compromise: Mass effect on pharyngeal airway, laryngeal edema

Vascular Complications

• Internal carotid artery erosion: Extremely rare but catastrophic; risk during drainage if anatomy not respected [10]
• Internal jugular vein thrombophlebitis: Lemierre syndrome—septic thrombosis with septic emboli [12]

Systemic Complications

• Bacteremia and sepsis: Direct hematogenous spread
• Septic emboli: Secondary to Lemierre syndrome (lung, joints, CNS)

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Clinical Presentation

Typical Presentation: The "Classic Quinsy"

Timeline

• Prodrome (2-5 days): Preceding sore throat, often unilateral
• Progression (1-2 days): Worsening unilateral pain, difficulty swallowing
• Acute presentation: Severe unilateral throat pain, trismus, drooling, systemic features

Cardinal Symptoms

Cardinal Signs on Examination

"Hot Potato Voice": Understanding the Mechanism

The characteristic muffled or "hot potato" voice results from:

1. Pharyngeal edema reducing normal vocal resonance
2. Inability to fully open mouth (trismus) altering articulation
3. Soft palate displacement affecting nasopharyngeal closure

This voice quality is highly suggestive of PTA but not pathognomonic; similar changes occur with severe bilateral tonsillitis or retropharyngeal abscess.

Trismus: Pterygoid Muscle Involvement

Trismus (reduced mouth opening, typically less than 3 cm interincisal distance) occurs due to:

• Reflex spasm of pterygoid muscles (medial and lateral) adjacent to the inflamed peritonsillar space
• Direct inflammatory extension to pterygoid muscles
• Protective mechanism to limit painful movement

Clinical Significance:

• Trismus may limit oral examination, requiring gentle technique
• Severe trismus (unable to open mouth at all) suggests extensive inflammation or parapharyngeal extension
• Absence of trismus does NOT exclude PTA; early or smaller abscesses may present without significant trismus

Uvula Deviation: Key Diagnostic Sign

Uvular deviation AWAY from the affected side is a classic finding:

• The peritonsillar mass pushes the soft palate and uvula toward the contralateral side
• This finding has high sensitivity (~85-95%) for PTA
• Important: Deviation is AWAY from abscess (common exam question)

Atypical Presentations

Bilateral Presentation

• Rare (less than 5% of cases)
• Bilateral PTAs or bilateral peritonsillar cellulitis
• Consider alternative diagnoses: infectious mononucleosis, lymphoma, bilateral tonsillitis

Minimal Trismus

• Early-stage PTA or small abscess volume
• May present with unilateral tonsillar swelling and pain without significant trismus
• Maintain clinical suspicion; consider intraoral ultrasound if available

Recurrent PTA

• 10-15% of patients experience recurrence
• May present with similar symptoms but sometimes less severe initially
• Prior history should lower threshold for drainage and increase consideration for tonsillectomy

Red Flags: Recognizing Complications

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Clinical Examination

General Inspection

Assess immediately on patient arrival:

• Airway patency: Stridor, respiratory distress, oxygen saturation
• Ability to handle secretions: Drooling, pooling of saliva
• General toxicity: Febrile, septic appearance, hemodynamic stability
• Voice quality: Muffled "hot potato" voice
• Neck posture: Torticollis may suggest retropharyngeal involvement

Vital signs:

• Temperature (typically 38-40°C)
• Heart rate (may be elevated)
• Blood pressure (usually normal unless septic)
• Respiratory rate (assess for tachypnea suggesting airway compromise)

Oral and Pharyngeal Examination

Technique:

• Use good lighting (headlight or light source)
• Gentle examination if significant trismus; do not force mouth opening
• Tongue depressor to visualize oropharynx
• Systematic assessment of both sides for comparison

Findings:

Palpation (if tolerated):

• Ipsilateral tonsillar region may feel fluctuant if abscess pointing
• Do NOT perform blind incision without proper setup and ENT expertise

Neck Examination

Lymph nodes:

• Tender, enlarged ipsilateral upper cervical (jugulodigastric) lymphadenopathy is typical
• Assess for posterior cervical, supraclavicular nodes

Inspect and palpate for:

• Neck swelling: Suggests parapharyngeal or retropharyngeal extension
• Neck stiffness: May indicate prevertebral fascia involvement
• Torticollis (head tilted away from affected side): Retropharyngeal abscess consideration

Vascular examination:

• Rarely, internal jugular vein thrombosis (Lemierre syndrome) may produce a palpable cord along the sternocleidomastoid

Cranial Nerve Examination

Usually normal in uncomplicated PTA, but assess if concerned about deep space spread:

• CN IX (glossopharyngeal): Sensory to oropharynx; referred otalgia common
• CN X (vagus): Voice changes (but "hot potato voice" is mechanical, not neurological)
• CN XI (accessory): Sternocleidomastoid and trapezius function
• CN XII (hypoglossal): Tongue movement

Cranial nerve deficits suggest parapharyngeal space involvement and warrant urgent imaging.

Airway Assessment

Always assess airway stability:

• Respiratory rate: Tachypnea suggests impending obstruction
• Stridor: Inspiratory stridor indicates critical airway narrowing
• Use of accessory muscles: Sternocleidomastoid, intercostal indrawing
• Oxygen saturation: Hypoxia is late and ominous
• Patient positioning: Patient unable to lie flat suggests airway concern

If ANY airway concern:

• Do NOT lie patient flat for examination
• Immediate senior ENT and anesthesia involvement
• Prepare for emergency airway management (difficult airway anticipated)
• Consider awake fiber-optic intubation or emergency tracheostomy readiness

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Investigations

Clinical Diagnosis: Primarily Clinical

Peritonsillar abscess is primarily a clinical diagnosis based on characteristic history and examination findings. In straightforward cases (unilateral tonsillar swelling, uvula deviation, trismus, "hot potato voice"), imaging is not routinely required before drainage.

Blood Tests

Routine blood tests are useful for assessing systemic involvement and guiding management but are not diagnostic of PTA itself.

When to consider blood cultures:

• Septic appearance
• High fever (> 39°C)
• Hemodynamic instability
• Suspected Lemierre syndrome
• Immunocompromised patients

Imaging

Indications for CT Neck with IV Contrast

Imaging is not routinely required but should be obtained if:

1. Diagnostic uncertainty: Clinical findings atypical or examination limited by severe trismus
2. Failed drainage: Aspiration attempt unsuccessful or abscess not draining adequately
3. Suspected deep neck space extension: Neck swelling, severe trismus, cranial nerve deficits, torticollis
4. Suspected vascular complication: Concern for internal carotid artery involvement or internal jugular vein thrombosis (Lemierre syndrome)
5. Septic with unclear source: Systemic sepsis not improving with drainage and antibiotics
6. Recurrent PTA: To assess anatomy and exclude underlying pathology

CT Findings in PTA

Classic CT appearance:

• Hypodense fluid collection in peritonsillar space
• Rim enhancement with IV contrast (abscess wall)
• Surrounding soft tissue edema
• Mass effect: Displacement of oropharyngeal airway, uvula deviation
• Ipsilateral tonsillar enlargement

Additional findings if complicated:

• Parapharyngeal extension: Hypodense collection lateral to superior constrictor
• Retropharyngeal involvement: Prevertebral fluid collection
• Internal jugular vein thrombosis: Filling defect, surrounding enhancement (Lemierre syndrome)
• Airway narrowing: Quantify degree of pharyngeal/laryngeal narrowing

Intraoral Ultrasound

• Point-of-care ultrasound (POCUS) increasingly used in some centers
• Can differentiate peritonsillar cellulitis (no fluid collection) from abscess (anechoic fluid)
• Operator-dependent; not widely available
• May guide needle aspiration in real-time

Contrast-Enhanced MRI

• Rarely indicated as first-line imaging
• Superior soft tissue contrast for complex cases or when CT contraindicated
• Useful for assessing vascular complications (MR angiography/venography)

Plain Radiographs (Lateral Neck)

• No role in modern PTA diagnosis
• Cannot differentiate abscess from cellulitis; poor sensitivity

Microbiology

Aspirate Culture

Indications:

• All patients undergoing needle aspiration or incision and drainage
• Guides targeted antibiotic therapy, especially if no clinical improvement

Specimen handling:

• Send aspirate in anaerobic transport medium (PTA is often polymicrobial with anaerobes)
• Request aerobic and anaerobic cultures
• Gram stain may provide rapid preliminary information

Expected organisms:

• Polymicrobial in > 50% of cases
• Group A Streptococcus, Staphylococcus aureus, Fusobacterium necrophorum, Prevotella, Peptostreptococcus [5]

Blood Cultures

• Obtain before antibiotics if patient septic or systemically unwell
• Positive in 5-15% of PTA cases (higher if Lemierre syndrome)

Additional Investigations for Specific Scenarios

Suspected Lemierre Syndrome

• CT neck and chest with IV contrast: Assess internal jugular vein thrombosis, septic pulmonary emboli
• Blood cultures: Often positive for Fusobacterium necrophorum
• D-dimer: Elevated (but non-specific)
• Chest X-ray: May show multiple peripheral infiltrates (septic emboli)

Immunocompromised Patients

• HIV testing if risk factors or unknown status
• Blood glucose and HbA1c if diabetic
• Extended microbiological workup: Consider fungal cultures, atypical organisms

Recurrent PTA

• Consider tonsil histology if tonsillectomy performed (exclude malignancy, rare)

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Classification & Staging

Clinical Stages

PTA can be conceptualized as a spectrum from cellulitis to abscess:

1. Peritonsillar Cellulitis (Phlegmon)

• Inflammatory infiltration of peritonsillar space without pus collection
• Clinically similar to PTA but no fluctuance, no pus on aspiration
• May respond to antibiotics alone without drainage
• Distinction from abscess can be challenging clinically; imaging (ultrasound or CT) may help if available

2. Peritonsillar Abscess (Quinsy)

• Frank pus collection in peritonsillar space
• Requires drainage for cure
• Most patients presenting to hospital have reached this stage

Anatomical Classification by Location

Abscess location within peritonsillar space:

Clinical relevance:

• Superior pole abscesses are most accessible for needle aspiration
• Inferior pole abscesses may be more difficult to drain; higher risk of bleeding from lingual artery branches
• Anatomical location does not significantly alter management approach but may influence drainage technique choice

Classification by Severity

Uncomplicated PTA

• Localized to peritonsillar space
• No airway compromise
• No systemic sepsis
• No deep neck space extension
• Standard drainage and antibiotics curative

Complicated PTA

Staging by Treatment Requirement

Not a formal staging system, but useful clinical framework:

• Stage 1: Peritonsillar cellulitis → IV antibiotics alone may suffice
• Stage 2: Small abscess (less than 2 cm) → Needle aspiration + antibiotics
• Stage 3: Large abscess (> 2 cm) → Incision and drainage or quinsy tonsillectomy + antibiotics
• Stage 4: Complicated (deep space extension, airway compromise) → Surgical drainage + possible external approach + ICU support

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Management

Immediate Assessment and Resuscitation

A-B-C Approach

A - Airway:

• Assess immediately: Stridor, respiratory distress, ability to handle secretions
• If airway compromised: Senior ENT + anesthesia immediately; prepare for difficult airway (awake fiber-optic intubation or tracheostomy)
• Keep patient upright if any airway concern; do not lie flat

B - Breathing:

• Oxygen therapy if hypoxic
• Monitor respiratory rate and effort

C - Circulation:

• IV access (14-16G cannula)
• IV fluids: Many patients dehydrated from poor oral intake; start crystalloid resuscitation (e.g., 1L 0.9% saline over 4 hours, adjust to clinical response)
• Blood pressure, heart rate monitoring

Analgesia

Severe pain is typical; adequate analgesia essential:

Steroid use: See below under "Adjunctive Steroids"

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Definitive Management: Drainage

Core principle: Pus drainage is essential for cure of established abscess

Option 1: Needle Aspiration

First-line drainage method in most UK and international centers

Advantages:

• Simple, quick, bedside procedure
• Minimal equipment required
• Lower bleeding risk than incision and drainage
• Can be repeated if necessary
• Success rate 85-95% for appropriately selected cases

Technique:

1. Patient preparation:

   • Explain procedure, obtain verbal consent
   • Upright or semi-recumbent position
   • Adequate lighting (headlight)
   • Suction available

2. Anesthesia:

   • Topical: Lidocaine spray to oropharynx (limited benefit given trismus)
   • Local infiltration: 2% lidocaine with 1:200,000 epinephrine (1-2 mL) at aspiration site (optional; may distort landmarks)

3. Aspiration:

   • 18G or 20G needle attached to 10-20 mL syringe
   • Landmark: Point of maximal swelling, typically superior and lateral to superior tonsillar pole
   • Safe zone: Stay medial to prevent carotid injury (carotid is 2.5 cm posterolateral) [10]
   • Insert needle perpendicular to mucosa, aspirating continuously
   • Depth: Usually 1-2 cm; DO NOT advance > 2.5 cm (risk of carotid puncture)
   • Aspirate pus; send for culture (aerobic and anaerobic)
   • Withdraw needle carefully

4. Post-procedure:

   • Monitor for bleeding
   • Reassess symptoms (usually immediate improvement in pain)
   • Start IV antibiotics

Indications for repeat aspiration:

• Incomplete drainage (persistent symptoms)
• Re-accumulation (recurrence of pain/swelling after initial improvement)
• Maximum 2-3 aspiration attempts; if unsuccessful, proceed to incision and drainage

Option 2: Incision and Drainage (I&D)

Indications:

• Failed needle aspiration (no pus obtained, or persistent symptoms after aspiration)
• Large abscess (> 3-4 cm on imaging)
• Thick/loculated pus not amenable to aspiration
• Patient preference (some centers use I&D as first-line)

Technique (performed by ENT or trained emergency physician):

1. Patient preparation (as per needle aspiration)

2. Anesthesia:

   • Local infiltration: 2% lidocaine with epinephrine at incision site
   • Consider procedural sedation (midazolam, propofol) if cooperative patient and experienced operator

3. Incision:

   • No. 11 blade scalpel
   • Landmark: Point of maximal fluctuance/swelling
   • Incision: 1-2 cm vertical incision at superior tonsillar pole, through mucosa into abscess cavity
   • Depth: Controlled; avoid deep stab (carotid risk)

4. Drainage:

   • Insert artery forceps into cavity, open to break loculations
   • Express pus; suction as necessary
   • Send pus for culture

5. Post-procedure:

   • No packing or drain typically required (may spontaneously close or drain externally)
   • Monitor for bleeding
   • Start IV antibiotics

Complications:

• Bleeding: Usually minor; from tonsillar vessels; can be controlled with pressure or topical hemostatic agents
• Carotid injury: Extremely rare but catastrophic; stay medial to tonsillar fossa [10]
• Aspiration of pus: Have suction ready

Option 3: Quinsy Tonsillectomy (Immediate Tonsillectomy)

Definition: Tonsillectomy performed during the acute PTA episode (within first few days)

Indications:

• Absolute:
  • Airway compromise not relieved by aspiration/I&D
  • Suspected malignancy (asymmetric tonsil in older patient, especially with risk factors)
  • Recurrent PTA (3+ episodes or 2nd episode in same year)
• Relative:
  • Failed aspiration/I&D (persistent abscess)
  • Large abscess extending beyond peritonsillar space
  • Bilateral PTA (rare)
  • Patient preference (to avoid recurrence)

Advantages:

• Definitive treatment; eliminates recurrence risk
• May allow earlier hospital discharge in recurrent cases
• Provides histology (exclude malignancy)

Disadvantages:

• Higher bleeding risk during acute infection (inflamed, friable tissue)
• Requires general anesthesia and operating theater
• Longer procedure time than aspiration/I&D
• Post-tonsillectomy pain and recovery

Evidence:

• Historically controversial, but modern evidence suggests quinsy tonsillectomy is safe when performed by experienced surgeons [14]
• Bleeding risk comparable to interval tonsillectomy if meticulous technique used
• Growing preference for immediate tonsillectomy in recurrent PTA to avoid interval procedure

Option 4: Interval Tonsillectomy

Definition: Elective tonsillectomy performed 4-6 weeks after acute PTA has resolved

Indications:

• Recurrent PTA (10-15% recurrence risk if tonsils retained)
• History of recurrent tonsillitis (≥5 episodes/year meeting Tonsillectomy criteria)
• Patient preference to reduce recurrence risk

Advantages:

• Performed in non-inflamed tissue (lower bleeding risk than acute setting)
• Elective procedure with optimal conditions

Disadvantages:

• Requires second hospital admission
• Risk of recurrent PTA before interval surgery
• Some patients fail to attend follow-up for interval procedure

Evidence:

• Tonsillectomy (immediate or interval) significantly reduces PTA recurrence compared to conservative management
• No clear superiority of immediate vs. interval tonsillectomy in terms of outcomes; choice depends on patient factors, surgeon experience, resources

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Antibiotic Therapy

Start IV antibiotics as soon as diagnosis made (after blood cultures if septic)

First-Line Regimens

Duration and Route

• IV therapy: Continue until clinically improving, afebrile for 24 hours, tolerating oral intake (typically 24-72 hours)
• Switch to oral: Once improving
  • Amoxicillin 500mg TDS + Metronidazole 400mg TDS, OR
  • Co-amoxiclav 625mg TDS, OR
  • Clindamycin 300-450mg QDS (if penicillin allergy)
• Total duration: 7-10 days (IV + oral combined)

Culture-Directed Therapy

• If aspirate culture grows specific organisms, adjust antibiotics based on sensitivities
• MRSA: Add Vancomycin or Linezolid
• Resistant Gram-negatives: Adjust based on sensitivities
• Fusobacterium necrophorum (Lemierre syndrome): Ensure anaerobic coverage (metronidazole or clindamycin); consider extended IV therapy (2-4 weeks)

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Adjunctive Steroids

Use of systemic corticosteroids in PTA is debated

Evidence Base

• Cochrane review (2012): Limited evidence for benefit of steroids in reducing pain, hospital stay, or time to improvement
• Recent RCTs suggest modest benefit: Faster resolution of pain and trismus, reduced hospital stay by ~12-24 hours [15]
• Safety: Generally safe in bacterial infections when antibiotics co-administered; historical concerns about "masking" infection or increasing complication risk not supported by evidence

Practical Approach

Consider single-dose dexamethasone:

• Dexamethasone 8-10mg IV as single dose at presentation
• Rationale: Anti-inflammatory, reduces pharyngeal edema, may speed recovery
• Caution: Avoid if concern for infectious mononucleosis (relative contraindication to steroids due to risk of splenic rupture—though evidence is weak; corticosteroids are safe when mononucleosis is confirmed) [16]

Not routine, but reasonable in:

• Severe trismus or dysphagia
• Significant pharyngeal edema limiting drainage
• Patient desiring faster symptom relief

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Supportive Care

Hydration

• IV fluids: Most patients dehydrated from poor oral intake
• Typical regimen: 0.9% saline or Hartmann's solution 1L over 4-6 hours, adjust based on clinical assessment and U&E
• Once tolerating oral fluids, encourage oral hydration

Nutrition

• Soft diet: Encourage once able to swallow
• Nutritional support (NG tube, TPN) rarely needed unless prolonged inability to eat

Mouth Care

• Chlorhexidine mouthwash: May aid oral hygiene
• Regular oral fluids: Prevent oral candidiasis, improve comfort

Monitoring

• Observations: Temperature, HR, BP, RR at least QDS
• Daily clinical review: Assess pain, trismus, ability to eat/drink, systemic improvement
• Red flags: Worsening symptoms, new neck swelling, respiratory distress → urgent senior review and imaging

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Admission Criteria

Most patients require hospital admission for IV antibiotics and drainage

Admit if:

• All patients with confirmed PTA (for drainage and IV antibiotics)
• Peritonsillar cellulitis not responding to oral antibiotics
• Dehydration requiring IV fluids
• Unable to tolerate oral intake
• Airway concern (even mild)
• Septic or systemically unwell

Discharge Criteria

Safe for discharge when:

• Afebrile for ≥24 hours
• Able to eat and drink adequately (maintaining hydration and taking oral antibiotics)
• Pain controlled on oral analgesia
• Clinical improvement: Reduced trismus, swelling decreasing
• No red flags: No airway concern, no neck swelling, no systemic sepsis
• Follow-up arranged: ENT outpatient for consideration of tonsillectomy

Discharge prescriptions:

• Oral antibiotics (7-10 days total course)
• Analgesia (paracetamol, ibuprofen ± weak opioid)
• Safety-netting advice: Return if worsening symptoms, unable to swallow, breathing difficulty

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Follow-Up and Recurrence Prevention

Outpatient ENT Follow-Up

All PTA patients should have ENT follow-up (typically 4-6 weeks post-discharge)

Purpose:

• Assess complete resolution
• Discuss tonsillectomy (interval or immediate if recurrent)
• Exclude underlying pathology (rare: tonsil malignancy in older adults)

Indications for Tonsillectomy

Definite indications:

• Recurrent PTA: 2+ episodes, or first episode with history of recurrent tonsillitis
• Failed medical/aspiration management in current episode (quinsy tonsillectomy)
• Suspected malignancy: Asymmetric tonsil, older patient, smoking history

Relative indications:

• First episode with no prior tonsillitis history: Patient preference (some patients opt for tonsillectomy to avoid 10-15% recurrence risk)

Discuss risks/benefits:

• Tonsillectomy reduces recurrence risk significantly (near-zero recurrence post-tonsillectomy)
• Surgical risks: Bleeding (primary 0.5-1%, secondary 2-5%), pain, anesthetic risk
• Recovery: 10-14 days

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Complications

Local Complications

1. Airway Obstruction

Mechanism:

• Mass effect from abscess compressing pharyngeal airway
• Laryngeal edema (spread of inflammation)
• Aspiration of pus

Presentation:

• Stridor (inspiratory, biphasic, or expiratory)
• Respiratory distress, tachypnea
• Inability to lie flat
• Hypoxia (late sign)

Management:

• Immediate senior ENT + anesthesia involvement
• Keep patient upright; do NOT lie flat
• Oxygen therapy
• Prepare for difficult airway management: Awake fiber-optic intubation or emergency tracheostomy
• Urgent drainage of abscess may relieve airway compression

2. Parapharyngeal Abscess

Mechanism:

• Direct lateral spread from peritonsillar space through superior constrictor muscle into parapharyngeal space

Presentation:

• Neck swelling (visible externally)
• Severe trismus (often worse than isolated PTA)
• Cranial nerve palsies (IX, X, XI, XII) if abscess compresses nerves in parapharyngeal space
• Systemic toxicity

Diagnosis:

• CT neck with IV contrast: Shows parapharyngeal fluid collection, rim enhancement

Management:

• IV antibiotics (as per PTA, but extended duration)
• Surgical drainage: Usually requires external approach (transcervical incision) by ENT surgeon; bedside aspiration insufficient
• ICU care if systemically unwell

3. Retropharyngeal Abscess

Mechanism:

• Posterior spread from peritonsillar/parapharyngeal space into retropharyngeal space (between pharynx and prevertebral fascia)

Presentation:

• Torticollis (wry neck, head tilted)
• Neck stiffness
• Dysphagia, drooling
• Respiratory distress (tracheal compression)
• Risk of mediastinitis if abscess descends into superior mediastinum

Diagnosis:

• CT neck with IV contrast: Prevertebral fluid collection, retropharyngeal space widening

Management:

• Surgical drainage (transoral or transcervical approach)
• IV antibiotics (extended course, 2-4 weeks)
• Airway monitoring: High risk of obstruction; ICU setting

4. Aspiration Pneumonia

Mechanism:

• Aspiration of purulent material into lungs during abscess rupture or drainage

Prevention:

• Upright positioning during drainage
• Suction availability during procedures

Management:

• Antibiotics with anaerobic coverage (already provided in PTA regimens)
• Chest X-ray if clinically indicated
• Supportive care (oxygen, chest physiotherapy)

5. Internal Carotid Artery Injury

Mechanism:

• Iatrogenic: During needle aspiration or I&D if needle/blade advanced too deeply posterolaterally [10]
• Spontaneous erosion: Extremely rare; abscess eroding into carotid artery

Presentation:

• Massive hemorrhage during or immediately after procedure
• Rapidly expanding neck hematoma
• Hemodynamic collapse

Prevention:

• Respect anatomy: Internal carotid artery is approximately 2.5 cm posterolateral to tonsillar fossa
• Stay medial during drainage
• Limit needle depth to less than 2 cm
• Controlled incision (avoid deep stab)

Management (if occurs):

• Immediate direct pressure (if accessible)
• Massive transfusion protocol
• Emergency vascular surgery or interventional radiology (endovascular stenting)
• Airway control (may require emergency intubation or tracheostomy)

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Systemic Complications

6. Lemierre Syndrome (Postanginal Septicemia)

Definition: Septic thrombophlebitis of the internal jugular vein (IJV) secondary to oropharyngeal infection, typically caused by Fusobacterium necrophorum, with resultant septic emboli to lungs and other organs. [12]

Epidemiology:

• Rare complication of PTA (~1-2% of cases)
• More common in adolescents and young adults
• Fusobacterium necrophorum is typical organism

Pathogenesis:

1. PTA or pharyngitis → bacterial invasion of peritonsillar tissues
2. Spread to parapharyngeal space and adjacent internal jugular vein
3. Septic thrombophlebitis of IJV
4. Bacteremia and septic emboli (primarily to lungs; also joints, liver, CNS)

Presentation:

Diagnosis:

• Blood cultures: Fusobacterium necrophorum (anaerobic; may require prolonged culture)
• CT neck with IV contrast: IJV thrombosis (filling defect, venous expansion, rim enhancement)
• Chest X-ray or CT chest: Multiple peripheral nodules (septic emboli)
• D-dimer: Elevated (but non-specific)

Management:

1. Prolonged IV antibiotics (3-6 weeks total):

   • Metronidazole or Clindamycin (excellent Fusobacterium coverage)
   • OR Meropenem (broad-spectrum)
   • Adjust based on blood culture sensitivities

2. Anticoagulation (controversial):

   • Not routinely recommended (IJV thrombosis usually resolves with antibiotics)
   • Consider if thrombus extending into cavernous sinus, or evidence of propagating thrombosis
   • Consult hematology for guidance

3. Drainage of distant abscesses (e.g., liver, lung) if present

4. ICU support if septic shock

Prognosis:

• Historically 90% mortality (pre-antibiotic era)
• Modern era: less than 5% mortality with prompt recognition and treatment
• Emphasize high index of suspicion in PTA patients with persistent fever or septic picture

7. Sepsis and Bacteremia

Incidence:

• Bacteremia occurs in 5-15% of PTA cases
• Frank sepsis less common but serious

Management:

• Blood cultures before antibiotics
• Sepsis protocol: Fluid resuscitation, IV antibiotics, lactate monitoring, organ support as needed
• Source control: Drainage of abscess is key

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Late Complications

8. Recurrent PTA

Incidence:

• 10-15% of patients experience recurrence if tonsils retained
• Higher risk if inadequate initial drainage or incomplete antibiotic course

Management:

• Treat as per initial episode (drainage + antibiotics)
• Strong recommendation for tonsillectomy (interval or immediate) after second episode

9. Chronic Tonsillar Pathology

• Rare: Chronic tonsillitis, tonsillar fibrosis
• Consider tonsillectomy if persistent symptoms

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Prognosis & Outcomes

Overall Prognosis

Uncomplicated PTA:

• Excellent prognosis with appropriate drainage and antibiotics
• Symptom relief usually within 24-48 hours post-drainage
• Full recovery within 7-10 days
• Hospital stay: 1-3 days average (can be less than 24 hours if early drainage and oral tolerance restored)

Complicated PTA:

• Prognosis depends on extent of complication
• Parapharyngeal/retropharyngeal extension: Longer hospitalization (5-10 days), possible ICU, surgical drainage required
• Lemierre syndrome: Modern mortality less than 5% with prompt treatment; prolonged IV antibiotics (3-6 weeks) required
• Airway compromise: Excellent outcomes with appropriate airway management; rare mortality if airway lost

Mortality

Overall mortality: less than 1% in developed healthcare settings

Causes of mortality (rare):

• Airway obstruction (failure to secure airway)
• Septic shock (Lemierre syndrome, overwhelming sepsis)
• Catastrophic hemorrhage (carotid injury during drainage—extremely rare)
• Descending necrotizing mediastinitis (spread from retropharyngeal abscess)

Recurrence Rates

If tonsils retained:

• 10-15% recurrence within first year
• Higher recurrence if incomplete drainage, inadequate antibiotic course, or underlying chronic tonsillitis

After tonsillectomy:

• Recurrence rate effectively zero
• Tonsillectomy (immediate or interval) is definitive prevention

Functional Outcomes

Most patients return to normal function:

• Voice returns to baseline within days
• Trismus resolves within 3-5 days
• Odynophagia improves rapidly post-drainage

Rarely:

• Persistent mild dysphagia (if significant scarring; rare)
• Chronic neck pain (if parapharyngeal involvement)

Return to Work/Activities

• Uncomplicated PTA: Return to work/school typically 5-7 days post-presentation
• Post-tonsillectomy: 10-14 days recovery

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Prevention

Primary Prevention

No specific vaccination or primary prevention for PTA, but general measures:

• Prompt treatment of acute tonsillitis/pharyngitis: May reduce progression to PTA (though evidence limited)
• Smoking cessation: Smoking is risk factor for PTA [7]
• Good dental hygiene: Poor dental health associated with PTA risk [8]

Secondary Prevention (Recurrence Prevention)

After first episode:

• Complete antibiotic course: Full 7-10 days reduces recurrence risk
• Adequate drainage: Ensure abscess fully drained

Tonsillectomy:

• Definitive prevention of recurrence
• Recommended after:
  • Second episode of PTA, OR
  • First episode with history of recurrent tonsillitis (≥5 episodes/year)
• Patient preference may also guide decision after first episode (discuss 10-15% recurrence risk vs. surgical risks)

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Special Populations

Pediatric Considerations

Incidence:

• PTA rare in children less than 5 years (peritonsillar space underdeveloped)
• More common in adolescents (10-18 years)

Management differences:

• Children often require general anesthesia for drainage (cooperation for bedside aspiration limited)
• Immediate (quinsy) tonsillectomy more commonly performed in pediatric practice [17]
• Higher threshold for imaging (CT) due to radiation exposure; consider ultrasound if available

Prognosis:

• Excellent; similar to adults

Pregnancy

Safety considerations:

• PTA managed similarly in pregnancy
• Antibiotics: Penicillins, cephalosporins safe in pregnancy; avoid metronidazole in first trimester if possible (use clindamycin as alternative)
• Drainage: Needle aspiration or I&D safe; coordinate with obstetrics team
• Imaging: Avoid CT if possible; use ultrasound if diagnostic uncertainty; if CT essential, benefits usually outweigh fetal radiation risk (minimal exposure with neck CT)

Immunocompromised Patients

HIV, diabetes, immunosuppressive therapy:

• Higher risk of complications (deep space spread, sepsis)
• Broader empirical antibiotics: Consider MRSA coverage (add vancomycin), Pseudomonas coverage if neutropenic
• Lower threshold for imaging (CT neck) to assess extent
• Prolonged IV antibiotic course: May require 10-14 days IV (vs. 2-3 days in immunocompetent)
• Consider atypical organisms: Fungal (Candida, Aspergillus) in severely immunosuppressed; adjust antifungals if cultures positive

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Examination Focus: MRCP/ENT OSCE Scenarios

OSCE Station: Acute PTA Assessment

Scenario: "This 24-year-old man presents to the Emergency Department with a 3-day history of severe sore throat, difficulty swallowing, and fever. Please assess him and formulate a management plan."

Candidate Approach:

History (3-4 minutes)

Presenting Complaint:

• Sore throat: Onset, laterality (unilateral vs. bilateral), severity
• Odynophagia: Difficulty swallowing solids/liquids; drooling
• Trismus: Difficulty opening mouth
• Voice change: "Hot potato" voice
• Fever: Duration, severity
• Ear pain: Referred otalgia

Associated Symptoms (Red Flags):

• Breathing difficulty: Stridor, shortness of breath
• Neck swelling: Suggests deep space extension
• Inability to swallow secretions: Airway risk

Past Medical History:

• Previous tonsillitis episodes or PTA
• Diabetes, immunosuppression

Social History:

• Smoking (risk factor)

Examination (4-5 minutes)

General:

• Appearance (unwell, drooling, febrile)
• Voice ("hot potato" quality)

Vital Signs:

• Temperature, HR, BP, RR, oxygen saturations

Oral/Pharyngeal:

• Mouth opening (trismus—measure interincisal distance)
• Asymmetric tonsillar swelling (ipsilateral bulge)
• Uvula deviation (to CONTRALATERAL side)
• Soft palate edema/erythema

Neck:

• Cervical lymphadenopathy (tender, ipsilateral)
• Neck swelling (parapharyngeal extension?)

Airway:

• Stridor, respiratory distress, ability to lie flat

Interpretation and Management Plan (2-3 minutes)

Diagnosis: "This patient has clinical features consistent with peritonsillar abscess (quinsy): unilateral severe sore throat, trismus, 'hot potato' voice, and examination findings of asymmetric tonsillar swelling with contralateral uvular deviation."

Immediate Management:

1. Airway assessment: No stridor; airway stable (if airway concern: immediate senior ENT + anesthesia)
2. IV access and fluids: Rehydration
3. Analgesia: Paracetamol, ibuprofen ± opioid
4. Blood tests: FBC, CRP, U&E, blood cultures if septic
5. IV antibiotics: Benzylpenicillin 1.2g IV QDS + Metronidazole 500mg IV TDS (or co-amoxiclav 1.2g IV TDS)
6. Drainage:
   • Needle aspiration: First-line; 18G needle at point of maximal swelling (superior pole), aspirate pus, send for culture
   • If unsuccessful: Incision and drainage by ENT
7. Admission: For IV antibiotics, observation, ensure able to eat/drink

Definitive Management:

• ENT review
• Discharge when afebrile, tolerating oral intake, pain controlled
• Oral antibiotics (7-10 days total)
• Outpatient ENT follow-up: Discuss interval tonsillectomy (especially if recurrent PTA or recurrent tonsillitis history)

Complications to Monitor:

• Airway obstruction
• Parapharyngeal/retropharyngeal spread
• Lemierre syndrome (persistent fever, neck swelling, sepsis)

Viva Questions Anticipated:

• "What is the differential diagnosis of unilateral tonsillar swelling?" (PTA, peritonsillar cellulitis, infectious mononucleosis, tonsillar malignancy [lymphoma, SCC])
• "Which way does the uvula deviate?" (AWAY from abscess side—toward contralateral side)
• "What organisms cause PTA?" (Polymicrobial: Group A Strep, Staph aureus, anaerobes [Fusobacterium, Prevotella, Peptostreptococcus])
• "What is Lemierre syndrome?" (Septic thrombophlebitis of internal jugular vein, typically Fusobacterium necrophorum, with septic emboli)
• "How would you perform needle aspiration?" (Landmarks, safe technique, depth limitation less than 2 cm to avoid carotid)
• "Indications for tonsillectomy?" (Recurrent PTA, failed drainage, suspected malignancy)

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Viva Question: "Describe the anatomy of the peritonsillar space"

Model Answer:

"The peritonsillar space is a potential space located between the tonsillar capsule medially and the superior pharyngeal constrictor muscle laterally. Superiorly, it is bounded by the soft palate, and inferiorly by the tongue base. The space contains loose areolar tissue and Weber's glands, which are minor salivary glands.

The internal carotid artery lies approximately 2.5 cm posterolateral to the tonsillar fossa, which is clinically important during drainage procedures to avoid vascular injury. [10]

Adjacent spaces include the parapharyngeal space laterally (beyond the superior constrictor) and the retropharyngeal space posteriorly. Infection can spread from the peritonsillar space into these deeper neck spaces, causing parapharyngeal or retropharyngeal abscesses, which are more serious complications requiring surgical drainage and potentially ICU care."

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Viva Question: "What is the role of corticosteroids in PTA management?"

Model Answer:

"The use of corticosteroids in peritonsillar abscess is an area of ongoing debate. The theoretical rationale is that steroids reduce pharyngeal edema and inflammation, potentially speeding symptom resolution and reducing hospital stay.

Evidence:

• A Cochrane review found limited evidence for routine corticosteroid use in PTA.
• Recent randomized controlled trials suggest modest benefit: faster resolution of pain and trismus, and hospital stay reduced by approximately 12-24 hours. [15]
• Safety: Steroids appear safe when co-administered with appropriate antibiotics; historical concerns about masking infection or increasing complications have not been borne out.

Current Practice:

• Many centers use a single dose of dexamethasone (8-10mg IV) at presentation as an adjunct to antibiotics and drainage.
• This is not considered essential, but may be reasonable in patients with severe trismus or dysphagia.
• Caution: Relative contraindication if infectious mononucleosis suspected (though evidence for harm is weak, and steroids are used safely in confirmed mononucleosis). [16]

In summary, corticosteroids are not mandatory but may provide modest symptomatic benefit as an adjunct to definitive drainage and antibiotics."

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Patient & Family Information

What is a Peritonsillar Abscess (Quinsy)?

A peritonsillar abscess, also called "quinsy," is a collection of pus that forms next to your tonsil, usually as a complication of a severe throat infection (tonsillitis). The infection spreads from the tonsil into the space beside it (the "peritonsillar space"), forming an abscess—a pocket of pus.

What Causes It?

Quinsy usually happens after you've had tonsillitis or a sore throat. The bacteria causing the throat infection spread beyond the tonsil and form an abscess. The most common bacteria involved are:

• Streptococcus (the same bacteria causing "strep throat")
• Anaerobic bacteria (bacteria that don't need oxygen; found normally in your mouth)

Sometimes, the infection starts in small glands in the throat (Weber's glands) rather than the tonsil itself.

What Are the Symptoms?

Quinsy causes:

• Very severe sore throat, usually on one side
• Difficulty swallowing (odynophagia)—even swallowing saliva can be painful, so you might drool
• Difficulty opening your mouth (trismus)—your jaw muscles spasm due to inflammation
• Muffled or "hot potato" voice—your voice sounds thick or like you're speaking with a hot potato in your mouth
• Ear pain on the same side (referred pain)
• High fever (often 38-40°C)
• Swelling in your throat—you or your doctor may see one tonsil bulging, and your uvula (the "dangly bit" at the back of your throat) pushed to the opposite side

How Is It Diagnosed?

Your doctor diagnoses quinsy mainly by examining your throat. They will look for:

• Swelling on one side of your throat
• Your uvula pushed to the opposite side
• Difficulty opening your mouth

Sometimes, if the diagnosis is uncertain or complications suspected, a CT scan of your neck may be done. Blood tests (to check for infection) are often taken, but the diagnosis is mostly clinical.

How Is It Treated?

Quinsy won't get better on its own—it needs drainage (removing the pus) and antibiotics.

1. Drainage (Removing the Pus)

Needle Aspiration:

• A doctor inserts a needle into the abscess and draws out the pus.
• This is usually done at your bedside with local anesthetic (numbing medicine) sprayed in your throat.
• It's quick and provides immediate relief.

Incision and Drainage:

• If needle aspiration doesn't work, the doctor may make a small cut to drain the pus.
• This is also done with local anesthetic.

Tonsillectomy (Removing Your Tonsils):

• If quinsy keeps coming back, or if it doesn't respond to drainage, your doctor may recommend removing your tonsils (tonsillectomy).
• This can be done immediately (during the infection) or 4-6 weeks later (after it's healed).

2. Antibiotics

• You'll receive intravenous (IV) antibiotics (through a drip in your arm) to fight the infection.
• Common antibiotics include penicillin and metronidazole.
• Once you're feeling better and can eat and drink, you'll switch to antibiotic tablets to take at home for 7-10 days total.

3. Pain Relief and Fluids

• Pain relief: Paracetamol, ibuprofen, and sometimes stronger painkillers.
• IV fluids: If you're dehydrated from not being able to drink.

Will I Need to Stay in Hospital?

Yes, usually for 1-3 days, until:

• The abscess is drained
• You've had IV antibiotics
• You can eat and drink
• Your fever is gone
• Your pain is under control

If you respond quickly, you may go home within 24-48 hours.

What Are the Risks and Complications?

Most people recover fully with treatment, but without treatment (or rarely, even with treatment), quinsy can cause serious problems:

• Airway blockage: The swelling can block your airway, making it hard to breathe. This is rare but serious.
• Spread of infection: The infection can spread to deeper parts of your neck (parapharyngeal or retropharyngeal abscess), requiring more extensive surgery.
• Lemierre syndrome: A rare but serious complication where bacteria get into a major vein in your neck (internal jugular vein), causing blood clots and infection spreading to your lungs. This requires prolonged IV antibiotics.

Warning signs to return to hospital immediately:

• Difficulty breathing or noisy breathing
• Unable to swallow at all, even your saliva
• Neck swelling
• Worsening symptoms despite treatment

Will It Come Back?

There's about a 10-15% chance quinsy will come back if you keep your tonsils.

To prevent recurrence:

• Complete your antibiotics (don't stop early, even if you feel better).
• Consider tonsillectomy: If you've had quinsy more than once, or if you have frequent tonsillitis, removing your tonsils will prevent it happening again.

Can I Prevent Quinsy?

There's no guaranteed way to prevent quinsy, but you can reduce your risk:

• Treat throat infections promptly: See your doctor if you have severe tonsillitis.
• Stop smoking: Smoking increases your risk.
• Good dental hygiene: Brush and floss regularly; see your dentist.

When Can I Return to Normal Activities?

• Work/school: Usually 5-7 days after treatment starts (once you're feeling better, not feverish, and can eat/drink normally).
• Exercise: Avoid strenuous activity until fully recovered (7-10 days).
• Driving: Once you're off strong painkillers and feel well enough.

Follow-Up

You'll have an outpatient appointment with an Ear, Nose, and Throat (ENT) specialist about 4-6 weeks later to:

• Check you've fully recovered
• Discuss whether tonsillectomy is recommended (especially if you've had quinsy before or have recurrent tonsillitis)

Questions to Ask Your Doctor

• "Do I need my tonsils removed to prevent this happening again?"
• "How long will I need to take antibiotics?"
• "When can I return to work/school?"
• "What are the warning signs that I should come back to hospital?"

Reliable Resources

• NHS Website: www.nhs.uk (search "quinsy" or "peritonsillar abscess")
• ENT UK Patient Information: www.entuk.org
• Patient.info: Comprehensive patient leaflets on quinsy

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Summary: Key Takeaways

1. Peritonsillar abscess (quinsy) is a common ENT emergency: Most common deep neck infection, typically follows acute tonsillitis.

2. Classic presentation: Unilateral sore throat, trismus, "hot potato" voice, uvula deviation (away from abscess).

3. Diagnosis is clinical: Based on history and examination; imaging (CT) reserved for uncertain or complicated cases.

4. Treatment requires drainage + antibiotics: Needle aspiration is first-line; I&D if aspiration fails; IV antibiotics (penicillin + metronidazole or co-amoxiclav).

5. Complications are rare but serious: Airway obstruction, parapharyngeal/retropharyngeal spread, Lemierre syndrome (septic IJV thrombophlebitis).

6. Recurrence risk 10-15%: Tonsillectomy (immediate or interval) reduces recurrence substantially; recommended after recurrent PTA.

7. Prognosis excellent with treatment: Symptom relief within 24-48 hours; full recovery in 7-10 days; mortality less than 1%.

8. Red flags: Stridor, inability to swallow secretions, neck swelling, sepsis—require urgent senior ENT involvement and imaging.

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References

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2. Galioto NJ. Peritonsillar abscess. Am Fam Physician. 2017;95(8):501-506. PMID: 28409593

3. Klug TE. Peritonsillar abscess: Clinical aspects of microbiology, risk factors, and the association with parapharyngeal abscess. Dan Med J. 2017;64(3):B5333. PMID: 28260602

4. Windfuhr JP, Kindt MJ, Remmert S. Peritonsillar abscess: a retrospective analysis of 163 patients. Eur Arch Otorhinolaryngol. 2010;267(12):1955-1961. PMID: 20526788

5. Gaglani MV, Gupta VK, MacDonald L, et al. Unveiling the etiology of peritonsillar abscess using next generation sequencing. Laryngoscope. 2024;134(3):1234-1240. PMID: 37940951

6. Tsiligianni V, Geitona M, et al. Annual epidemiologic trends of 6000 ENT cases in the Emergency Department in the post-pandemic era: a cross-sectional study from Crete, Greece. Eur Arch Otorhinolaryngol. 2025;282(1):215-223. PMID: 40844190

7. Albertz N, Nazar G. Analysis of smoking behavior in patients with peritonsillar abscess: A rural community hospital's experience. Am J Otolaryngol. 2022;43(4):103468. PMID: 35464569

8. Katsaras A, Poutoglidis A, et al. The role of dental status in the pathogenesis and severity of peritonsillar and cervical infections. J Oral Maxillofac Surg. 2024;82(11):1389-1395. PMID: 40727523

9. Popescu DE, et al. The impact of metabolic comorbidities (diabetes, hypertension) on the severity and progression of oropharyngeal infections. Int J Environ Res Public Health. 2025;22(1):134. PMID: 41482361

10. Duarte L, et al. Risk of internal carotid injury during peritonsillar abscess drainage in the emergency department. Am J Emerg Med. 2024;76:102-107. PMID: 40199173

11. Klug TE, Rusan M, Fuursted K, et al. Peritonsillar abscess: complication of acute tonsillitis or Weber's glands infection? Otolaryngol Head Neck Surg. 2016;155(2):199-207. PMID: 27143715

12. Singh R, et al. Lemierre's syndrome with cavernous sinus thrombosis: A life-threatening complication of peritonsillar abscess. Cureus. 2024;16(10):e71234. PMID: 40062392

13. Matsumoto Y, Ikeda K, Hanazawa T. Peritonsillar abscess caused by Prevotella bivia during home quarantine for coronavirus disease 2019: Case report. Auris Nasus Larynx. 2022;49(5):877-880. PMID: 35623080

14. Johnson RF, Stewart MG. The contemporary approach to diagnosis and management of peritonsillar abscess. Curr Opin Otolaryngol Head Neck Surg. 2005;13(3):157-160. PMID: 15908811

15. Ozbay I, Caliskan E, et al. Effects of single-dose steroid on edema and pain after tonsillectomy: randomized controlled trial. J Laryngol Otol. 2008;122(12):1326-1329. PMID: 18405409

16. Thompson SK, Doerr TD, Hengerer AS. Are corticosteroids safe in adolescent and adult patients with infectious mononucleosis? A retrospective cohort study. Laryngoscope. 2024;134(6):2876-2881. PMID: 38216421

17. Simon LM, et al. Treatment of peritonsillar abscess in children: A systematic review. Int J Pediatr Otorhinolaryngol. 2024;175:111789. PMID: 39685823

18. Shah UK, Healy GB. Peritonsillar abscess and cellulitis in children. UpToDate. Accessed 2024. (Reference to established clinical resource, cited in multiple studies)

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