Obstructive Jaundice — Viva Defence

Long case viva — pancreatic head cancer presenting as obstructive jaundice

Candidate's opening statement (SASPOP)

"Doctor, my patient is a 68-year-old man with four weeks of painless progressive obstructive jaundice from a pancreatic head mass. His problems are: obstructive jaundice with a bilirubin of 210 micromol per litre, pale stools and dark urine; a 7-kilogram weight loss suggesting malignancy; Courvoisier sign (palpable gallbladder) pointing to a malignant distal obstruction; a markedly elevated CA 19-9 at 420 U per mL; and a 3 cm pancreatic head mass on triple-phase CT with no vascular encasement and no metastases, classifying the tumour as resectable. My priorities are to obtain tissue confirmation by EUS-FNA, to exclude autoimmune pancreatitis with a serum IgG4, to stage definitively with possible staging laparoscopy, and to proceed to pancreaticoduodenectomy with curative intent, avoiding routine preoperative biliary drainage which has been shown to increase complications." [1]

Problem list

1. Obstructive (surgical) jaundice — conjugated hyperbilirubinaemia, elevated ALP and GGT, pale stools, dark urine, pruritus.
2. Pancreatic head mass — likely pancreatic ductal adenocarcinoma; resectable on CT staging.
3. Weight loss and possible new-onset diabetes — paraneoplastic or direct endocrine effect.
4. Courvoisier sign — strongly suggests malignancy over stone disease [5].
5. Elevated CA 19-9 — consistent with pancreatic malignancy, but limited by false positives in obstruction and false negatives in Lewis-negative individuals [4].

Integrated management plan

Tissue diagnosis. EUS-FNA of the pancreatic head mass to confirm adenocarcinoma before committing to surgery or neoadjuvant therapy. EUS-FNA has a sensitivity of 85 to 92 per cent and a specificity of 95 to 98 per cent for solid pancreatic lesions [8].

Exclude mimics. Check serum IgG4 to exclude autoimmune pancreatitis (type 1, IgG4-related), which presents as painless obstructive jaundice with a pancreatic mass and is steroid-responsive rather than surgical. [1]

Staging. Triple-phase CT has confirmed resectability (no vascular encasement, no metastases). Staging laparoscopy immediately before laparotomy to exclude occult peritoneal and liver metastases [3].

Resection. Pancreaticoduodenectomy (Whipple) with curative intent — the only potentially curative treatment for pancreatic ductal adenocarcinoma. Adjuvant chemotherapy (gemcitabine-based or FOLFIRINOX depending on fitness). [1]

Pre-operative optimisation. Correct the coagulopathy with vitamin K (check INR; corrects if hepatocytes are intact). Optimise nutrition and glycaemic control. Assess cardiac and respiratory fitness for major surgery. [1]

No routine preoperative biliary drainage. The van der Gaag NEJM 2010 trial showed routine PBD increased serious complications from 39 to 74 per cent. Reserve PBD for cholangitis, delayed surgery, or neoadjuvant therapy [6].

Palliative pathway if unresectable. If staging laparoscopy reveals metastases, the approach shifts to ERCP biliary stenting (self-expanding metal stent for longer patency), palliative chemotherapy, celiac plexus neurolysis for pain, and palliative care involvement. [1]

Examiner probing questions

Examiner: "What is Courvoisier sign and how reliable is it?" Courvoisier sign is a palpable, non-tender, distended gallbladder in a jaundiced patient. The law states that in jaundice, a palpable gallbladder is unlikely to be due to gallstones (because chronic stone disease thickens and fibroses the gallbladder wall, preventing distension) and is more likely due to malignancy (which causes slow progressive obstruction of a compliant gallbladder). Modern evidence shows it has a low sensitivity of about 26 to 55 per cent but a moderate-to-high specificity of 83 to 90 per cent for malignancy. Its absence does not exclude malignancy, but its presence strongly suggests it [5].

Examiner: "Why is the bilirubin conjugated and why are the stools pale?" Obstruction of the common bile duct prevents conjugated bilirubin from reaching the gut. It refluxes back into the bloodstream (conjugated hyperbilirubinaemia) and is filtered by the kidney (dark urine). Because no bilirubin reaches the gut, stercobilin is not formed and the stools become acholic (pale, clay-coloured). The elevated ALP and GGT reflect the cholestatic injury to hepatocytes and canaliculi; the GGT confirms the hepatic origin of the ALP. [1]

Examiner: "What are the limitations of CA 19-9 in this patient?" CA 19-9 is falsely elevated in benign biliary obstruction, cholangitis, and cirrhosis, so it cannot distinguish malignant from benign obstruction with certainty. It is also falsely normal in the 5 to 10 per cent of the population who are Lewis-antigen-negative and cannot synthesise it. It is therefore a monitoring marker (for treatment response and recurrence) rather than a diagnostic or screening marker. The diagnosis is made by imaging and tissue [4].

Examiner: "Would you drain this patient's biliary tree before surgery?" No. Routine preoperative biliary drainage before pancreaticoduodenectomy is not recommended. The van der Gaag NEJM 2010 randomised trial showed that PBD was associated with a higher rate of serious complications (74 versus 39 per cent) compared with early surgery, with many complications related to the stenting procedure. I would reserve PBD for cholangitis, if surgery must be delayed, or for neoadjuvant chemotherapy. I would proceed to early surgery with coagulation corrected [6].

Branching scenario — acute ascending cholangitis

Examiner: "Now consider a 60-year-old woman who presents with fever, rigors, jaundice, and right upper quadrant pain, and is hypotensive and confused on arrival. How would you diagnose and manage her?" [1]

This is acute ascending cholangitis with Reynolds pentad (Charcot triad of fever, jaundice, and RUQ pain, plus hypotension and altered mental state). I would apply the Tokyo Guidelines 2018 diagnostic criteria: systemic inflammation (fever, high WCC) plus cholestasis (jaundice, abnormal LFTs) plus imaging (biliary dilatation or a cause such as a stone). The presence of organ dysfunction (hypotension, confusion, coagulopathy) classifies this as Grade III (severe) cholangitis [1].

Management follows three pillars: (1) resuscitation (IV fluids, vasopressors, supportive care); (2) broad-spectrum antibiotics covering Gram-negatives and enterococci (piperacillin-tazobactam) after blood cultures; and (3) urgent biliary drainage by ERCP (sphincterotomy, stone extraction, or stenting), with PTC or surgery if ERCP fails. The critical principle is that antibiotics alone cannot sterilise an obstructed, pressurised biliary tree — drainage is essential. TG18 recommends emergent drainage for Grade III as soon as the patient is resuscitated [1].

Examiner: "Why is drainage essential and not just antibiotics?" The obstructed biliary tree is under pressure, and bacteria-laden bile cannot be cleared. The raised intrabiliary pressure forces bacteria and endotoxin through the bile canaliculi into the systemic circulation (cholangio-venous reflux), producing bacteraemia and septic shock. Antibiotics cannot reach bactericidal concentrations in an obstructed system, so without decompression the sepsis will progress. [1]

Branching scenario — choledocholithiasis and ASGE risk stratification

Examiner: "What if the jaundiced patient were a 45-year-old woman with biliary colic, a bilirubin of 50 micromol per litre, gallstones on ultrasound, and a dilated CBD of 9 mm with no stone seen? How would you determine whether she has a CBD stone?" [1]

I would apply the 2019 ASGE risk stratification. She has intermediate-risk features (abnormal liver biochemical tests, a dilated CBD) but no high-risk criterion (no stone seen on imaging, no cholangitis, and bilirubin below 4 mg per dL). The ASGE guidelines recommend further evaluation with MRCP, EUS, or intraoperative cholangiography before deciding on ERCP, because ERCP carries a significant complication rate and should not be used diagnostically when MRCP can answer the question [2]. I would arrange MRCP (the gold-standard non-invasive test, sensitivity above 90 per cent for CBD stones). If MRCP confirms a stone, I would proceed to ERCP with sphincterotomy and stone extraction, followed by laparoscopic cholecystectomy during the same admission. If MRCP is negative, I would proceed to cholecystectomy with intraoperative cholangiography.

Branching scenario — primary sclerosing cholangitis

Examiner: "And what if the patient were a 28-year-old man with ulcerative colitis, a cholestatic LFT pattern (ALP three times normal, GGT elevated), and episodic pruritus, with no stones and no mass on ultrasound?" [1]

This is the classic presentation of primary sclerosing cholangitis. I would arrange an MRCP, which would characteristically show multifocal biliary strictures with intervening dilatations (the beaded or pruned-tree appearance). I would check perinuclear antineutrophil cytoplasmic antibody (positive in most patients), immunoglobulins, and exclude viral and autoimmune hepatitis. The diagnosis is clinical-radiological; biopsy is rarely needed. There is no effective medical therapy — ursodeoxycholic acid does not improve survival. The critical management issues are surveillance for cholangiocarcinoma (which occurs in 10 to 15 per cent of PSC patients and must be excluded at every ERCP with brushings), colorectal cancer surveillance (annual colonoscopy given the IBD), and consideration of liver transplantation for end-stage disease [7].

Short-case discussion — abdominal examination in a jaundiced patient

Examiner: "Examine this patient's abdomen. He is jaundiced." [1]

My routine: general inspection for the depth of jaundice (scleral icterus, cutaneous jaundice), scratch marks and excoriations (pruritus), cachexia, and the stigmata of chronic liver disease (spider naevi, palmar erythema, gynaecomastia, caput medusae); hands for clubbing, palmar erythema, asterixis (hepatic encephalopathy); face for scleral icterus and conjunctival pallor; neck for Virchow's node (Troisier sign, suggesting abdominal malignancy); abdomen — inspect for distension and scars, palpate for hepatosplenomegaly, a palpable gallbladder (Courvoisier sign), an epigastric mass, and shifting dullness (ascites), and auscultate bowel sounds and for a bruit. [1]

Presentation: "On general inspection the patient is deeply icteric with scratch marks consistent with pruritus. The abdomen is soft with a palpable, non-tender gallbladder in the right upper quadrant (Courvoisier sign) and a firm epigastric mass. There is no hepatosplenomegaly or ascites. These findings are consistent with obstructive jaundice from a malignant distal biliary obstruction, most likely pancreatic head cancer. I would review the imaging, obtain tissue, stage for resectability, and check the coagulation." [1]

Examiner: "What would you look for to suggest hepatic failure rather than simple obstruction?" Asterixis (the flapping tremor of hepatic encephalopathy), constructional apraxia, spider naevi, ascites, and a failure of the INR to correct with vitamin K — these suggest hepatocellular failure rather than purely obstructive cholestasis. [1]