Scrotal Lumps

1. Clinical Overview

Summary

Scrotal lumps represent one of the most common presentations in urological and general practice, affecting males across all age groups from neonates to the elderly. While the vast majority of scrotal masses are benign—including hydroceles, varicoceles, epididymal cysts, and inguinoscrotal hernias—the primary clinical imperative is the exclusion of testicular malignancy, which typically presents as a painless, firm intratesticular mass in men aged 20-40 years. [1,2]

The diagnostic approach relies on systematic clinical examination incorporating three cardinal questions: (1) Can you get above the swelling? (2) Is the mass separate from the testis? (3) Does it transilluminate? These simple bedside assessments can distinguish most pathologies and guide appropriate investigation and management. Scrotal ultrasound remains the gold standard imaging modality when clinical examination is equivocal or when an intratesticular lesion is suspected. [3]

Early recognition of red flag features—particularly solid non-transilluminating masses, sudden-onset varicoceles in older men, or right-sided varicoceles—is critical to ensure timely diagnosis of malignancy and other serious pathology. The majority of benign scrotal pathology can be managed conservatively or with elective intervention, whereas testicular cancer requires urgent specialist referral and radical orchidectomy via an inguinal approach. [4]

Key Diagnoses

The differential diagnosis of scrotal lumps can be systematically categorised based on anatomical origin and pathophysiology:

1. Hydrocele: Accumulation of serous fluid within the tunica vaginalis (potential space surrounding the testis). Can be primary (idiopathic) or secondary to underlying testicular pathology, infection, trauma, or malignancy. [5]

2. Epididymal Cyst / Spermatocele: Fluid-filled cyst arising from the epididymis (usually the head). Spermatoceles contain sperm and may appear milky on aspiration, whereas simple epididymal cysts contain clear fluid. [6]

3. Varicocele: Abnormal dilatation and tortuosity of the pampiniform venous plexus within the spermatic cord, resulting from venous reflux due to valvular incompetence. Affects approximately 15% of adult males and 40% of men presenting with infertility. [7]

4. Inguinoscrotal Hernia: Extension of abdominal contents (typically bowel or omentum) through the inguinal canal into the scrotum. Represents the most important "cannot get above it" diagnosis. [8]

5. Testicular Tumour: Solid malignancy arising from germ cells (95%) or sex cord-stromal cells (5%). Peak incidence occurs in men aged 20-40 years. Seminoma and non-seminomatous germ cell tumours (NSGCTs) account for the majority of cases. [9]

6. Other Pathology: Haematocele (blood within tunica vaginalis), lipoma of the cord, lymphocoele, scrotal abscess, idiopathic scrotal oedema (children), and rarely metastatic disease or lymphoma.

Clinical Pearls

"Can you get above the swelling?": The most important discriminator in scrotal examination.

• NO: The mass extends superiorly into the inguinal canal → Inguinoscrotal Hernia. This is a surgical emergency if incarcerated or strangulated.
• YES: The swelling is confined to the scrotum → Likely a primary scrotal pathology (hydrocele, varicocele, cyst, or testicular mass).

The Red Flag Varicocele: Approximately 90% of varicoceles occur on the LEFT side due to anatomical differences: the left testicular vein drains perpendicularly into the left renal vein (creating higher venous pressure), whereas the right testicular vein drains obliquely into the inferior vena cava at a lower pressure. [7]

• A RIGHT-sided varicocele is rare and should prompt investigation for retroperitoneal or abdominal mass causing venous compression or obstruction.
• A SUDDEN ONSET left varicocele in a man > 40 years is suspicious for renal cell carcinoma invading the left renal vein and obstructing venous drainage.
• A varicocele that does NOT collapse when the patient lies supine suggests venous obstruction and warrants urgent abdominal imaging.

Aspiration of Hydroceles: Generally avoided in modern practice. Aspiration provides only temporary relief as fluid re-accumulates within weeks to months in > 90% of cases. Additionally, there is significant risk of introducing infection (resulting in pyocele) and causing adhesions that complicate subsequent surgical repair. [10]

Transillumination Technique: Perform in a darkened room using a bright pen torch applied to the posterior aspect of the scrotum. A positive transillumination (red glow) indicates fluid-filled structure (hydrocele, epididymal cyst). Solid masses, blood, or bowel-containing hernias do NOT transilluminate. False positives can occur with very thin scrotal skin in infants.

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2. Epidemiology

Demographics and Prevalence

Scrotal pathology exhibits age-specific distribution patterns:

Risk Factors

Hydrocele:

• Neonatal: Patent processus vaginalis (communicating hydrocele)
• Adult: Previous trauma, infection (epididymo-orchitis), testicular tumour (10% present with secondary hydrocele), tropical infections (filariasis)

Varicocele:

• Anatomical predisposition (left testicular vein drainage pattern)
• Increased intra-abdominal pressure (occupational heavy lifting)
• Retroperitoneal mass (obstructive varicocele)

Testicular Cancer:

• Cryptorchidism (undescended testis) confers 5-10× increased risk [11]
• Family history (first-degree relative increases risk 6-10×)
• Contralateral testicular cancer (2-3% risk of metachronous tumour)
• Testicular microlithiasis on ultrasound
• Infertility and poor semen quality
• Klinefelter syndrome (47,XXY)

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3. Aetiology & Pathophysiology

Embryology and Anatomy

Understanding scrotal pathology requires knowledge of embryological development:

During fetal development, the testes descend from the abdomen through the inguinal canal into the scrotum, guided by the gubernaculum. The processus vaginalis (an outpouching of peritoneum) precedes testicular descent, creating a communication between the peritoneal cavity and scrotum. Normally, the processus vaginalis obliterates after birth, leaving only a small remnant surrounding the testis (the tunica vaginalis—a potential space with visceral and parietal layers). [12]

Communicating vs Non-Communicating Hydrocele:

• Patent processus vaginalis → Communicating hydrocele (fluid tracks from peritoneum into scrotum; size varies with position and intra-abdominal pressure)
• Obliterated processus vaginalis → Non-communicating hydrocele (isolated fluid collection in tunica vaginalis; constant size)

Pathophysiological Mechanisms

1. Hydrocele Formation

The tunica vaginalis normally produces a small amount of serous fluid for testicular lubrication, which is balanced by lymphatic reabsorption. Hydroceles develop when this balance is disrupted: [5]

• Increased fluid production: Secondary to inflammation (epididymo-orchitis), trauma, or malignancy
• Impaired lymphatic drainage: Idiopathic, post-surgical (inguinal hernia repair, varicocelectomy), filarial infection
• Patent processus vaginalis: Direct communication with peritoneal cavity (neonatal/infantile hydrocele)

Secondary Hydrocele: Up to 10% of testicular tumours present with an associated hydrocele due to altered fluid dynamics. Any new hydrocele in a young adult (20-40 years) warrants scrotal ultrasound to exclude underlying testicular pathology. [13]

2. Varicocele Pathophysiology

Varicoceles result from valvular incompetence of the internal spermatic vein (testicular vein), leading to retrograde venous blood flow and pooling within the pampiniform plexus. [7]

Left-Sided Predominance (85-90% of cases):

• Left testicular vein drains perpendicularly into the left renal vein (higher hydrostatic pressure)
• Right testicular vein drains obliquely into the IVC (lower pressure)
• Left renal vein may be compressed between the aorta and superior mesenteric artery ("nutcracker phenomenon"), increasing left testicular vein pressure

Impact on Fertility: Varicoceles are present in 15% of the general male population but 40% of men with primary infertility and 80% of men with secondary infertility. [14] Mechanisms of impaired spermatogenesis include:

• Elevated scrotal temperature (venous pooling raises testicular temperature by 1-2°C)
• Oxidative stress from hypoxia and venous stasis
• Retrograde flow of adrenal and renal metabolites into testicular circulation
• Hormonal dysfunction (altered testosterone and FSH levels)

3. Epididymal Cysts and Spermatoceles

These arise from obstruction or dilatation of the efferent ducts within the epididymis (most commonly the head/caput). Spermatoceles specifically contain sperm-rich fluid (milky appearance), whereas simple epididymal cysts contain clear serous fluid. Both are benign and rarely symptomatic. [6]

4. Testicular Tumours

Germ cell tumours (95% of testicular cancers) arise from primordial germ cells and are classified as:

• Seminoma (40-50%): Uniform population of cells; radiosensitive; excellent prognosis
• Non-seminomatous germ cell tumour (NSGCT) (50-60%): Includes embryonal carcinoma, yolk sac tumour, choriocarcinoma, teratoma; mixed histology common; may secrete AFP and β-hCG

Risk factors include cryptorchidism, testicular dysgenesis syndrome, and genetic predisposition. [9]

Exam Detail: Molecular Pathophysiology of Testicular Germ Cell Tumours:

Nearly all germ cell tumours arise from germ cell neoplasia in situ (GCNIS), formerly called intratubular germ cell neoplasia (ITGCN). GCNIS cells are aneuploid and typically demonstrate isochromosome 12p [i(12p)] or 12p amplification. [15]

Seminoma: Express OCT3/4, NANOG, and placental alkaline phosphatase (PLAP). KIT (CD117) mutations are common. High radiosensitivity and excellent prognosis (> 95% cure rate).

Non-Seminomatous Tumours:

• Embryonal carcinoma: Highly malignant; expresses OCT3/4 and CD30
• Yolk sac tumour: Secretes AFP; most common testicular tumour in children less than 3 years
• Choriocarcinoma: Secretes β-hCG; highly aggressive with haematogenous spread
• Teratoma: Contains elements from 2-3 germ layers; mature (benign) or immature (malignant)

Mixed tumours are common. Serum tumour markers (AFP, β-hCG, LDH) guide diagnosis, prognosis, and treatment monitoring.

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4. Clinical Presentation

History

A systematic history should elicit:

Presenting Complaint:

• Painless swelling (most common): Hydrocele, varicocele, epididymal cyst, testicular tumour
• Dragging/aching discomfort: Varicocele (worse at end of day or after prolonged standing), large hydrocele
• Pain: Suggests acute pathology (torsion, infection, trauma) rather than benign scrotal lump
• Change in size: Varicoceles enlarge with Valsalva and standing; reduce when lying down. Communicating hydroceles vary with intra-abdominal pressure.

Duration and Onset:

• Sudden onset: Trauma, haematocele, torsion, acute hernia incarceration
• Gradual onset: Hydrocele, varicocele, tumour, epididymal cyst

Associated Symptoms:

• Infertility or subfertility: Varicocele (present in 40% of men with primary infertility) [14]
• Systemically unwell, weight loss, night sweats: Metastatic testicular cancer, lymphoma
• Lower urinary tract symptoms: Concurrent prostatic pathology
• Abdominal mass or flank pain: Retroperitoneal mass causing obstructive varicocele or lymphatic obstruction

Risk Factors:

• Previous cryptorchidism, family history of testicular cancer, previous testicular tumour
• Previous scrotal surgery or trauma
• Inguinal hernia repair (risk of iatrogenic hydrocele or varicocele from lymphatic or venous damage)

Examination Findings

Systematic scrotal examination must be performed with the patient both standing and supine in a warm room to ensure scrotal relaxation.

Inspection

• Asymmetry: Unilateral swelling
• Skin changes: Erythema (infection), dilated veins (varicocele), oedema, sinuses
• Position: Does the swelling lie above or beside the testis?

Palpation

Step 1: Can you get above the swelling?

• NO → Inguinoscrotal hernia (extends into inguinal canal)
• YES → Isolated scrotal pathology

Step 2: Can you palpate the testis separately from the mass?

• NO → Intratesticular pathology (tumour, haematocele, orchitis) or hydrocele surrounding testis
• YES → Extratesticular pathology (epididymal cyst, varicocele, spermatocele)

Step 3: Describe the mass

• Consistency: Soft (hydrocele, hernia), firm-elastic (cyst), hard (tumour, haematocele), "bag of worms" (varicocele)
• Reducibility: Hernia reduces with gentle pressure; varicocele empties when supine
• Cough impulse: Present in inguinoscrotal hernia

Transillumination

Perform in a darkened room with a bright pen torch applied to the posterior scrotum:

• Positive (red glow): Fluid-filled structure (hydrocele, epididymal cyst, spermatocele)
• Negative (opaque): Solid mass (tumour), blood (haematocele), bowel (hernia)

Positional Changes

• Stand the patient up: Varicoceles become more prominent; communicating hydroceles may enlarge
• Valsalva manoeuvre: Increases varicocele size; demonstrates hernia reducibility
• Lying flat: Varicoceles decompress and become less prominent; hernias may reduce

Clinical Signs Summary Table

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5. Differential Diagnosis

Systematic Approach

The differential diagnosis of scrotal lumps should be considered based on age, acuity of presentation, and examination findings:

Age-Specific Differentials

Neonates and Infants (less than 2 years):

1. Communicating hydrocele (patent processus vaginalis)
2. Inguinal hernia
3. Testicular torsion (bimodal peak: neonatal and pubertal)

Children and Adolescents (2-18 years):

1. Hydrocele (usually non-communicating)
2. Varicocele (onset typically post-pubertal)
3. Epididymal cyst
4. Testicular torsion
5. Yolk sac tumour (rare, but most common paediatric testicular malignancy)

Young Adults (18-40 years):

1. Testicular tumour (MUST NOT MISS)
2. Varicocele
3. Epididymal cyst/spermatocele
4. Hydrocele
5. Inguinal hernia

Older Adults (> 40 years):

1. Hydrocele
2. Epididymal cyst
3. Inguinal hernia
4. Varicocele (NEW onset → exclude renal/retroperitoneal pathology)
5. Testicular tumour (lymphoma more common in this age group)

Key Distinguishing Features

Red Flags Requiring Urgent Investigation

1. Solid, non-transilluminating intratesticular mass → Urgent scrotal ultrasound and urology referral (suspected testicular cancer)
2. New varicocele in patient > 40 years → Abdominal/pelvic CT to exclude renal or retroperitoneal mass
3. Right-sided varicocele → Always pathological; requires cross-sectional imaging
4. Varicocele that does not reduce when supine → Suggests venous obstruction
5. Painful scrotal swelling with systemic upset → Exclude testicular torsion, epididymo-orchitis, or Fournier's gangrene

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6. Investigations

Clinical Examination as First-Line Investigation

In many cases, a thorough clinical examination is sufficient to diagnose benign scrotal pathology. However, any diagnostic uncertainty or suspicion of malignancy mandates scrotal ultrasound.

First-Line Investigations

Scrotal Ultrasound with Doppler

Indications:

• Any solid or suspicious mass on examination
• Inability to palpate the testis (e.g., large tense hydrocele)
• New hydrocele in young adult (20-40 years) to exclude underlying testicular tumour
• Equivocal examination findings
• Confirmation of varicocele and assessment of testicular size/echotexture in infertility workup [3]

Technique:

• High-frequency linear transducer (7-15 MHz)
• Both testes examined in longitudinal and transverse planes for comparison
• Colour Doppler to assess vascularity (hypervascular lesions suggest malignancy; varicocele demonstrates venous reflux on Valsalva)

Findings:

Sensitivity and Specificity:

• Testicular cancer detection: Sensitivity > 95%, Specificity 95-98% [3]
• Distinguishing intratesticular vs extratesticular masses: Accuracy > 99%

Second-Line Investigations

Serum Tumour Markers (if testicular tumour suspected)

Measured pre-operatively and used for diagnosis, staging, prognosis, and monitoring:

Important: Normal tumour markers do NOT exclude testicular cancer. Approximately 30% of NSGCTs and 90% of pure seminomas have normal markers. [16]

Semen Analysis (for Varicocele and Infertility)

Indicated in men with varicocele presenting with infertility or abnormal testicular volume:

• Volume, sperm concentration, motility, morphology
• DNA fragmentation index (advanced assessment)
• Pre- and post-varicocele repair comparison

Varicocele is associated with reduced sperm count, motility, and morphology ("stress pattern"). [14]

Third-Line and Specialist Investigations

Cross-Sectional Imaging (CT or MRI)

Indications:

• Staging of confirmed testicular cancer (CT chest/abdomen/pelvis post-orchidectomy)
• Investigation of suspected retroperitoneal or renal mass (new varicocele > 40 years, right-sided varicocele, non-reducing varicocele)

Inguinal Exploration and Biopsy

Reserved for cases where imaging is indeterminate and malignancy cannot be excluded. Performed via inguinal approach (NOT trans-scrotal) with early control of spermatic cord to prevent tumour dissemination. Frozen section histology guides decision for orchidectomy vs testis-sparing surgery.

Exam Detail: Interpretation Pearls:

Ultrasound Pitfalls:

• Testicular microlithiasis (echogenic foci less than 3mm): Incidental finding in 5% of men; associated with increased testicular cancer risk but does NOT require routine surveillance in asymptomatic men without risk factors [17]
• Epidermoid cyst: Benign intratesticular lesion with characteristic "onion-skin" appearance; testis-sparing excision may be appropriate
• Leydig cell tumour: Rare sex cord-stromal tumour; usually benign; well-defined hypoechoic mass; may be hormonally active (gynaecomastia, precocious puberty)

Tumour Marker Interpretation:

• Persistently elevated markers post-orchidectomy: Suggests metastatic disease requiring chemotherapy
• Rising markers on surveillance: Indicates relapse
• Inadequate marker decline post-chemotherapy: Suggests residual viable disease

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7. Classification and Staging

Hydrocele Classification

By Communication:

1. Communicating Hydrocele: Patent processus vaginalis allowing peritoneal fluid to enter tunica vaginalis; size varies with position; associated with risk of inguinal hernia
2. Non-Communicating (Simple) Hydrocele: Isolated fluid collection; constant size; obliterated processus vaginalis

By Aetiology:

1. Primary (Idiopathic): Unknown cause; most common in adults > 40 years
2. Secondary: Due to underlying pathology:
   • Testicular tumour (10%)
   • Infection (epididymo-orchitis, tuberculosis, filariasis)
   • Trauma or haematocele
   • Post-surgical (hernia repair, varicocelectomy)

Varicocele Grading

Clinical Grading (Dubin and Amelar):

• Grade I (Subclinical): Only detectable on Valsalva manoeuvre
• Grade II (Moderate): Palpable without Valsalva but not visible
• Grade III (Large): Visible and palpable without Valsalva ("bag of worms")

Prognostic Implications: Higher grades associated with greater testicular volume loss and more severe impairment of semen parameters. [7]

Testicular Cancer Staging (TNM and IGCCCG)

TNM Staging (8th Edition):

• pT1: Limited to testis and epididymis, no vascular/lymphatic invasion
• pT2: Vascular/lymphatic invasion OR extension through tunica albuginea into tunica vaginalis
• pT3: Invasion of spermatic cord
• pT4: Invasion of scrotum

International Germ Cell Cancer Collaborative Group (IGCCCG) Prognostic Classification:

[16]

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8. Management

General Principles

Management of scrotal lumps is guided by:

1. Excluding malignancy (clinical examination + ultrasound if any doubt)
2. Symptom severity (pain, discomfort, cosmetic concern, functional impairment)
3. Impact on fertility (varicocele)
4. Risk of complications (hernia incarceration, testicular atrophy)

The majority of benign scrotal pathology can be managed conservatively with reassurance and observation. Surgical intervention is reserved for symptomatic lesions, fertility concerns, or complications.

Management Algorithm

                    SCROTAL LUMP
                         ↓
         SYSTEMATIC EXAMINATION
                  ↓
      ┌───────────┴───────────┐
      │                       │
CAN GET ABOVE IT?         CANNOT GET ABOVE IT
      │                       │
     YES                      NO
      ↓                       ↓
TRANSILLUMINATES?        INGUINOSCROTAL HERNIA
  ┌─────┴─────┐               ↓
 YES         NO          SURGICAL REFERRAL
  ↓           ↓          (Assess for incarceration)
(Fluid)    (Solid)
  ↓           ↓
Hydrocele   Testis Palpable Separately?
Epididymal   ┌──────┴──────┐
  Cyst      YES           NO
  ↓          ↓             ↓
If young  Varicocele   Intratesticular Mass
or large    Hernia        ↓
  ↓          ↓         **URGENT ULTRASOUND**
ULTRASOUND  Manage       **2-WEEK-WAIT REFERRAL**
(confirm    based on       ↓
diagnosis)  symptoms   Urology Assessment
             ↓          Tumour Markers
       Conservative   Radical Orchidectomy
       or Surgical    (if malignancy confirmed)

Specific Management Strategies

1. Hydrocele

Neonatal and Infantile Hydrocele (less than 2 years):

• Observation: Majority resolve spontaneously by 12-24 months as processus vaginalis obliterates [5]
• Surgical repair: If persistent beyond age 2 years, increasing size, or associated inguinal hernia
  • "Procedure: High ligation of patent processus vaginalis via inguinal incision (same as paediatric hernia repair)"

Adult Hydrocele:

Conservative Management:

• Indicated for small (less than 5cm), asymptomatic hydroceles
• Reassurance that hydroceles are benign
• Aspiration is NOT recommended: Recurrence rate > 90%; risk of infection (pyocele) and adhesions [10]

Surgical Management:

• Indications: Large size causing discomfort, cosmetic concern, difficulty palpating testis, patient preference
• Procedures:
  1. Jaboulay Procedure (Eversion): Hydrocele sac opened, everted, and sutured behind testis and cord. Preferred for large hydroceles.
  2. Lord's Procedure (Plication): Multiple radial sutures placed to plicate hydrocele sac. Preferred for small-moderate hydroceles (less tissue dissection, lower haematoma risk).
  3. Excision: Complete excision of hydrocele sac (rarely performed due to higher complication rate)

Outcomes:

• Success rate > 95%; recurrence less than 5%
• Complications: Haematoma (5-10%), infection (less than 2%), chronic pain (rare), testicular atrophy (rare) [10]

Secondary Hydrocele:

• Always investigate underlying cause with scrotal ultrasound
• Treat primary pathology (e.g., orchidectomy for tumour, antibiotics for infection)

2. Epididymal Cyst and Spermatocele

Conservative Management (preferred):

• Reassurance that cysts are benign and very common
• Observation: Most remain stable in size
• Avoid surgery unless absolutely necessary: Surgical excision risks damage to epididymis and vas deferens, resulting in obstructive azoospermia (especially if bilateral) and chronic scrotal pain [6]

Surgical Management:

• Indications: Large size (> 3cm) causing significant discomfort or cosmetic concern; patient strongly desires intervention despite risks
• Procedure: Excision of cyst via scrotal incision with careful preservation of epididymis and vas deferens
• Counselling: Pre-operative discussion of risks (chronic pain 5-10%, infertility if bilateral)

3. Varicocele

Indications for Treatment:

1. Infertility: Palpable varicocele + abnormal semen analysis + female partner has normal fertility potential [14]
2. Testicular pain/discomfort: Failed conservative measures (scrotal support, NSAIDs)
3. Testicular atrophy: Particularly in adolescents (> 20% volume difference or progressive shrinkage on serial ultrasound)
4. Cosmetic concern: Patient preference after counselling

Conservative Management:

• Scrotal support (supportive underwear)
• Analgesia (NSAIDs)
• Reassurance (varicoceles are common and often asymptomatic)

Surgical/Interventional Management:

Options:

Preferred Technique: Microsurgical subinguinal varicocelectomy is gold standard due to lowest recurrence and complication rates. [18]

Outcomes:

• Fertility improvement: Meta-analyses demonstrate improvement in semen parameters in 60-70% and natural pregnancy rates improve by 30-40% compared to observation. [14]
• Recurrence: 1-2% (microsurgical) vs 10-15% (open/laparoscopic/embolisation)
• Complications: Hydrocele (1-3% microsurgical vs 7% open), testicular artery injury (rare with microsurgery), chronic pain (less than 2%)

4. Inguinoscrotal Hernia

Urgent Surgical Referral if:

• Irreducible hernia (risk of strangulation)
• Signs of bowel obstruction or ischaemia

Elective Surgical Repair:

• Indications: All inguinal hernias (risk of incarceration)
• Techniques: Open mesh repair (Lichtenstein) or laparoscopic repair (TEP/TAPP)
• Outcomes: Recurrence less than 1% with mesh repair [8]

5. Testicular Tumour

Urgent Urology Referral (2-week-wait pathway):

• Any solid intratesticular mass on examination or ultrasound

Investigations:

• Scrotal ultrasound (if not already performed)
• Pre-operative tumour markers: AFP, β-hCG, LDH
• Staging CT chest/abdomen/pelvis (usually post-orchidectomy to avoid delay)

Definitive Treatment: Radical Inguinal Orchidectomy

• Approach: Inguinal incision (NOT trans-scrotal) to prevent lymphatic spread to inguinal nodes
• Technique: Early ligation of spermatic cord at internal ring before manipulating testis; complete removal of testis, epididymis, and spermatic cord to internal ring
• Histology: Confirms diagnosis and guides adjuvant treatment

Adjuvant Treatment (based on histology and stage):

• Seminoma Stage I: Surveillance, single-dose carboplatin, or radiotherapy
• NSGCT Stage I: Surveillance or adjuvant chemotherapy (BEP) if high-risk features
• Metastatic disease: Platinum-based chemotherapy (BEP regimen); retroperitoneal lymph node dissection if residual masses post-chemotherapy

Outcomes:

• Overall 5-year survival: > 95% (all stages combined)
• Stage I disease: > 98% cure rate [16]

Exam Detail: Specific Treatment Protocols:

BEP Chemotherapy Regimen (Bleomycin, Etoposide, Cisplatin):

• Bleomycin: 30 units IV weekly
• Etoposide: 100 mg/m² IV days 1-5
• Cisplatin: 20 mg/m² IV days 1-5
• Cycles repeated every 21 days × 3-4 cycles depending on risk stratification

Surveillance Protocol for Stage I Seminoma:

• CT abdomen/pelvis: 3, 6, 12, 24 months, then annually to 5 years
• Chest X-ray: 3, 6, 12, 24 months
• Tumour markers: Each visit
• Relapse rate: 15-20%; salvage treatment > 95% successful

Carboplatin AUC7 (single-dose adjuvant for Stage I seminoma):

• Reduces relapse rate from 15-20% to 3-5%
• Dosed based on GFR (Calvert formula)

6. Haematocele

Conservative Management:

• Small haematoceles (less than 5cm) following minor trauma may resolve spontaneously over weeks to months
• Analgesia, scrotal support

Surgical Drainage:

• Indicated for large, tense haematoceles causing pain or if ultrasound cannot exclude underlying testicular injury/tumour
• Scrotal exploration: Evacuate clot, identify and ligate bleeding vessels, inspect testis for rupture

Special Populations

Paediatric Considerations

• Hydrocele: Observe until age 2 years; repair if persistent or communicating with risk of hernia
• Varicocele: Adolescent varicoceles require monitoring of testicular growth (serial ultrasound volumes). Intervene if progressive atrophy (> 20% difference or > 2mL volume loss). [19]
• Solid testicular masses: Yolk sac tumour most common; pre-pubertal testicular tumours have excellent prognosis

Fertility Considerations

• Varicocele repair: Improves semen parameters and natural pregnancy rates; discuss with fertility specialist if considering ART
• Orchidectomy: Offer sperm banking prior to radical orchidectomy (particularly if bilateral disease or abnormal contralateral testis)
• Avoid unnecessary epididymal cyst excision: High risk of obstructive azoospermia

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9. Complications

Complications of Pathology

Complications of Surgery

Hydrocele Repair:

• Haematoma: 5-10% (highest risk with Jaboulay procedure; reduced with Lord's plication)
• Infection: less than 2%
• Recurrence: less than 5%
• Chronic pain: Rare (less than 1%)

Varicocelectomy:

• Recurrence: 1-2% (microsurgical) vs 10-15% (open/embolisation)
• Hydrocele formation: 1-3% (microsurgical with lymphatic preservation) vs 7% (open without magnification)
• Testicular artery injury: less than 1% (microsurgical with artery identification)
• Chronic pain: less than 2%

Epididymal Cyst Excision:

• Chronic scrotal pain: 5-10%
• Damage to epididymis/vas deferens: Risk of obstructive azoospermia (2-5%, higher if bilateral)
• Recurrence: 5-10%

Radical Orchidectomy:

• Haematoma/seroma: 5%
• Wound infection: less than 2%
• Psychological impact: Body image concerns, anxiety, depression (consider prosthesis)

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10. Prognosis and Outcomes

Benign Scrotal Pathology

Hydrocele:

• Natural history: Neonatal hydroceles resolve spontaneously in 80-90% by age 12 months; adult primary hydroceles are usually stable or slowly progressive
• Post-surgical: Recurrence less than 5%; excellent long-term outcomes [10]

Varicocele:

• Fertility: Varicocele repair improves semen parameters in 60-70%; natural pregnancy rates increase by 30-40% compared to no treatment. [14]
• Pain: Surgical repair alleviates pain in 70-90% of symptomatic patients
• Testicular atrophy: Early intervention in adolescents may prevent or reverse atrophy [19]

Epididymal Cyst:

• Benign; rarely increase significantly in size; excellent prognosis

Testicular Cancer

Overall Survival:

• 5-year survival (all stages): > 95%
• Stage I disease: > 98%
• Metastatic disease: 70-90% depending on IGCCCG risk group [16]

Fertility After Treatment:

• Orchidectomy alone: Minimal impact if contralateral testis normal
• Chemotherapy: Temporary or permanent azoospermia in 30-50%; recovery of spermatogenesis possible after 2-3 years
• RPLND: Risk of retrograde ejaculation (10-30% with nerve-sparing technique)

Relapse Risk:

• Seminoma Stage I on surveillance: 15-20% (salvage > 95% successful)
• NSGCT Stage I on surveillance: 30% if vascular invasion present; 15% if absent

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11. Prevention & Screening

Primary Prevention

Testicular Cancer:

• Orchidopexy for cryptorchidism: Perform before age 2 years to optimise fertility; reduces but does NOT eliminate malignancy risk [11]
• Awareness and education in high-risk groups (family history, previous testicular cancer, cryptorchidism)

Varicocele:

• No established primary prevention
• Adolescent screening programs controversial (low evidence for routine intervention)

Screening and Surveillance

Testicular Self-Examination (TSE):

• Monthly TSE recommended for high-risk men (cryptorchidism, family history, previous testicular cancer)
• Technique: Examine each testis individually after warm bath/shower (scrotum relaxed); roll testis between thumb and fingers; feel for lumps, hardness, or change in size
• Controversies: Population-based TSE screening NOT recommended by most guidelines due to low cancer incidence and potential for anxiety/over-investigation

High-Risk Surveillance:

• Contralateral testis after orchidectomy: Annual ultrasound for 5 years (2-3% risk of metachronous tumour)
• Testicular microlithiasis + risk factors: Annual clinical examination; ultrasound only if palpable abnormality [17]

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12. Key Guidelines

European Association of Urology (EAU) Guidelines

Paediatric Urology (2023):

• Congenital hydrocele: Observe until age 12-24 months; repair if persistent
• Adolescent varicocele: Monitor testicular volume; intervene if > 20% asymmetry or progressive atrophy [19]

Male Infertility (2023):

• Varicocele repair recommended for palpable varicocele + abnormal semen analysis + normal female fertility [14]

Testicular Cancer (2023):

• Radical inguinal orchidectomy for suspected testicular tumour
• Risk-adapted treatment based on histology and stage
• Long-term surveillance protocols [16]

American Urological Association (AUA)

Varicocele (2014):

• Treat varicocele in adolescents with testicular asymmetry (> 20% or 2mL difference)
• Treat varicocele in adult men with abnormal semen analysis and palpable varicocele [18]

National Institute for Health and Care Excellence (NICE)

Suspected Cancer: Recognition and Referral (NG12, 2015):

• 2-week-wait referral for suspected testicular cancer: Non-painful enlargement or change in shape/texture of testis

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13. Exam-Focused Sections

Common FRCS/MRCS Exam Questions

1. Clinical Examination Station:

• Instruction: "Examine this patient's scrotum and present your findings."
• Key Steps: Consent, chaperone, patient standing and supine, inspection, palpation (get above it? separate from testis?), transillumination, assess for cough impulse and reducibility
• Red Flag Presentation: Hard intratesticular mass → "This is a solid mass within the body of the testis that does NOT transilluminate. I am concerned about testicular malignancy and would arrange urgent scrotal ultrasound and urology referral."

2. Viva Question: "What is the differential diagnosis of a scrotal lump?"

• Structured Answer: "I would categorise scrotal lumps based on examination findings:
  1. Cannot get above it: Inguinoscrotal hernia
  2. Transilluminates: Hydrocele (surrounds testis) or epididymal cyst (separate from testis)
  3. Bag of worms, reduces supine: Varicocele
  4. Solid, intratesticular: Testicular tumour (MUST NOT MISS)
  5. Solid, extratesticular: Haematocele, pyocele, chronic epididymitis"

3. Viva Question: "Why are varicoceles more common on the left?"

• Model Answer: "Varicoceles occur in 90% of cases on the left side due to anatomical factors. The left testicular vein drains perpendicularly into the left renal vein at 90 degrees, creating higher venous pressure, whereas the right testicular vein drains obliquely into the IVC at a lower pressure. Additionally, the left renal vein may be compressed between the aorta and superior mesenteric artery (nutcracker phenomenon), further increasing left-sided venous pressure."

4. Viva Question: "How do you manage a hydrocele in a 6-month-old boy?"

• Model Answer: "This is likely a congenital hydrocele due to patent processus vaginalis. I would reassure the parents that 80-90% resolve spontaneously by 12-24 months as the processus vaginalis obliterates. I would observe with clinical follow-up. If the hydrocele persists beyond age 2 years, increases in size, or is associated with an inguinal hernia, I would refer for surgical repair with high ligation of the patent processus vaginalis via an inguinal approach."

5. Viva Question: "What are the indications for varicocele repair?"

• Model Answer: "Indications for varicocele repair include:
  1. Infertility: Palpable varicocele with abnormal semen analysis in a couple seeking conception
  2. Pain: Persistent scrotal discomfort despite conservative measures (scrotal support, analgesia)
  3. Testicular atrophy: Particularly in adolescents with > 20% volume difference or progressive shrinkage on ultrasound
  4. Patient preference: After counselling regarding risks and benefits

The gold standard technique is microsurgical subinguinal varicocelectomy due to lowest recurrence (1-2%) and complication rates."

Viva Points

Viva Point: Opening Statement for Testicular Tumour: "Testicular cancer is the most common solid malignancy in men aged 15-35 years, with an annual incidence of 5-10 per 100,000 males. It presents as a painless, firm intratesticular mass. Germ cell tumours account for 95% of cases, classified as seminoma (40-50%) or non-seminomatous germ cell tumour (NSGCT, 50-60%). The prognosis is excellent with > 95% 5-year survival due to high chemosensitivity and effective multimodal treatment."

Key Facts to Mention:

• Risk factors: Cryptorchidism (5-10× increased risk), family history, contralateral tumour
• Tumour markers: AFP (elevated in NSGCTs, NEVER in pure seminoma), β-hCG (elevated in choriocarcinoma, some seminomas), LDH (non-specific)
• Gold standard investigation: Scrotal ultrasound (> 95% sensitivity)
• Treatment: Radical inguinal orchidectomy (NOT trans-scrotal approach)
• Staging with CT chest/abdomen/pelvis post-operatively
• IGCCCG risk stratification guides adjuvant therapy

Common Mistakes That Fail Candidates

❌ Performing trans-scrotal biopsy or orchidectomy for suspected testicular cancer (correct approach: inguinal with early cord control)

❌ Assuming normal tumour markers exclude testicular cancer (30% of NSGCTs and 90% of seminomas have normal markers)

❌ Recommending aspiration for adult hydrocele (recurrence > 90%, infection risk, adhesions)

❌ Missing red flags: Right-sided varicocele, new varicocele > 40 years (exclude retroperitoneal pathology)

❌ Operating on epididymal cysts without discussing fertility and chronic pain risks

❌ Failing to examine patient standing AND supine (miss varicocele reducibility)

Model Answers

Q: A 25-year-old man presents with a painless left scrotal swelling. Describe your approach.

A: "I would take a focused history: duration, pain, trauma, systemic symptoms, infertility, risk factors for testicular cancer (cryptorchidism, family history). On examination, I would assess both standing and supine:

1. Can I get above it? → If NO: inguinal hernia
2. Separate from testis? → If YES: extratesticular (cyst, varicocele); if NO: intratesticular (concerning for tumour) or hydrocele
3. Transillumination? → If YES: fluid-filled (hydrocele/cyst); if NO: solid or blood

If examination reveals a solid intratesticular mass, I would arrange urgent scrotal ultrasound and 2-week-wait urology referral with pre-operative tumour markers (AFP, β-hCG, LDH) for suspected testicular cancer.

If examination suggests benign pathology (e.g., varicocele), I would still perform ultrasound to confirm diagnosis and assess testicular size/echotexture, particularly given this patient is in the peak age range for testicular malignancy."

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14. Patient and Layperson Explanation

What is a Hydrocele?

A hydrocele is a collection of fluid around the testicle, similar to water in a balloon. It is usually harmless and painless. Hydroceles are common in newborn babies (and usually disappear by age 1-2 years) and in older men. Most hydroceles don't need treatment unless they become large and uncomfortable. If treatment is needed, a small operation can be done to remove the fluid sac.

What is a Varicocele?

A varicocele is a cluster of enlarged veins in the scrotum (like varicose veins in the leg). It feels like a "bag of worms" and is more noticeable when standing up. Varicoceles are common (affecting 15% of men) and usually harmless, but they can sometimes cause a dragging ache or affect fertility by slightly raising the temperature around the testicle. Treatment is only needed if it causes pain or fertility problems.

What is an Epididymal Cyst?

An epididymal cyst is a small, benign fluid-filled lump that sits next to the testicle (in a structure called the epididymis). These cysts are very common and almost never cause problems. They don't need treatment unless they become very large or bothersome. Surgery to remove them is usually avoided because it can cause long-term pain or affect fertility.

I found a hard lump on my testicle. What should I do?

This is urgent. You should see your doctor as soon as possible (ideally within a few days). Most lumps in the scrotum are harmless cysts, but a hard lump on the testicle itself could be a sign of testicular cancer. The good news is that testicular cancer is highly curable (> 95% cure rate) if caught early, so prompt investigation with an ultrasound scan is essential. Don't delay—early diagnosis saves lives.

When should I worry about a scrotal lump?

See a doctor urgently if:

• The lump is hard or feels different from the rest of the testicle
• The swelling appeared suddenly with severe pain (could be testicular torsion—a surgical emergency)
• You feel generally unwell with weight loss or night sweats
• The lump is growing rapidly
• You cannot feel your testicle within the swelling

Most scrotal lumps are benign, but it's always best to get checked to rule out anything serious.

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15. References

Primary Sources

1. Schneck FX, Bellinger MF. Abnormalities of the testes and scrotum and their surgical management. In: Wein AJ, et al. Campbell-Walsh Urology. 11th ed. Philadelphia: Elsevier; 2016. p.3452-3480.

2. Dagur G, Gandhi J, Suh Y, et al. Classifying hydroceles of the pelvis and groin: an overview of etiology, secondary complications, evaluation, and management. Curr Urol. 2017;10(1):1-14. doi:10.1159/000447145

3. Huang DY, Sidhu PS. Focal testicular lesions: colour Doppler ultrasound, contrast-enhanced ultrasound and tissue elastography as adjuvants to the diagnosis. Br J Radiol. 2012;85(Spec Iss 1):S41-S53. doi:10.1259/bjr/16779330

4. Rubenstein RA, Dogra VS, Seftel AD, Resnick MI. Benign intrascrotal lesions. J Urol. 2004;171(5):1765-1772. doi:10.1097/01.ju.0000120288.78364.76

5. Kiddoo DA. Management of neonatal hydrocele. Can Urol Assoc J. 2017;11(1-2Suppl1):S55-S57. doi:10.5489/cuaj.4419

6. Leung AK, Kao CP, Sauve RS. Scrotal swelling in children. Am Fam Physician. 2005;72(10):2119-2124.

7. Jensen CFS, Østergren P, Dupree JM, et al. Varicocele and male infertility. Nat Rev Urol. 2017;14(9):523-533. doi:10.1038/nrurol.2017.98

8. HerniaSurge Group. International guidelines for groin hernia management. Hernia. 2018;22(1):1-165. doi:10.1007/s10029-017-1668-x

9. Albers P, Albrecht W, Algaba F, et al. Guidelines on testicular cancer: 2015 update. Eur Urol. 2015;68(6):1054-1068. doi:10.1016/j.eururo.2015.07.044

10. Shan CJ, Lucon AM, Arap S. Comparative study of sclerotherapy with phenol and surgical treatment for hydrocele. J Urol. 2003;169(4):1056-1059. doi:10.1097/01.ju.0000052665.94399.22

11. Wood HM, Elder JS. Cryptorchidism and testicular cancer: separating fact from fiction. J Urol. 2009;181(2):452-461. doi:10.1016/j.juro.2008.10.074

12. Hutson JM, Li R, Southwell BR, Petersen BL, Thorup J, Cortes D. Germ cell development in the postnatal testis: the key to prevent malignancy in cryptorchidism? Front Endocrinol (Lausanne). 2013;3:176. doi:10.3389/fendo.2012.00176

13. Wein AJ, Kavoussi LR, Partin AW, Peters CA. Campbell-Walsh Urology. 11th ed. Philadelphia: Elsevier; 2016.

14. Baazeem A, Belzile E, Ciampi A, et al. Varicocele and male factor infertility treatment: a new meta-analysis and review of the role of varicocele repair. Eur Urol. 2011;60(4):796-808. doi:10.1016/j.eururo.2011.06.018

15. Oosterhuis JW, Looijenga LH. Testicular germ-cell tumours in a broader perspective. Nat Rev Cancer. 2005;5(3):210-222. doi:10.1038/nrc1568

16. International Germ Cell Cancer Collaborative Group. International Germ Cell Consensus Classification: a prognostic factor-based staging system for metastatic germ cell cancers. J Clin Oncol. 1997;15(2):594-603. doi:10.1200/JCO.1997.15.2.594

17. Richenberg J, Belfield J, Ramchandani P, et al. Testicular microlithiasis imaging and follow-up: guidelines of the ESUR scrotal imaging subcommittee. Eur Radiol. 2015;25(2):323-330. doi:10.1007/s00330-014-3442-z

18. Goldstein M, Gilbert BR, Dicker AP, Dwosh J, Gnecco C. Microsurgical inguinal varicocelectomy with delivery of the testis: an artery and lymphatic sparing technique. J Urol. 1992;148(6):1808-1811. doi:10.1016/s0022-5347(17)37035-2

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Medical Disclaimer: MedVellum content is for educational purposes and clinical reference. Clinical decisions should account for individual patient circumstances. Always consult appropriate specialists and current evidence-based guidelines when managing patients.