{"title": "Chapter 6: Liver, Biliary Tract, and Pancreatic Disorders", "flashcards": [{"q": "Name the five Child-Pugh variables.", "a": "Serum bilirubin, serum albumin, prothrombin time (PT/INR), degree of ascites, and grade of hepatic encephalopathy. Scores 5–6 = Child-Pugh A (compensated); 7–9 = B; 10–15 = C (decompensated). Grade C predicts <50% 1-year survival without transplant."}, {"q": "What is the diagnostic criteria for primary biliary cholangitis (PBC)?", "a": "Two of three: elevated ALP (cholestatic); AMA-M2 positive (>95% sensitivity); liver biopsy showing non-suppurative destructive cholangitis of interlobular bile ducts. All three are not required. UDCA 13–15 mg/kg/day is first-line treatment and slows progression to cirrhosis."}, {"q": "What is the MELD score and what does it calculate?", "a": "MELD = 3.78 × ln[bilirubin (mg/dL)] + 11.2 × ln[INR] + 9.57 × ln[creatinine (mg/dL)] + 6.43. Predicts 90-day mortality in chronic liver disease. Used for liver transplant waitlist prioritisation. MELD-Na incorporates serum sodium and improves predictive accuracy."}, {"q": "Name three complications of portal hypertension.", "a": "Oesophageal and gastric varices (and variceal haemorrhage); ascites and spontaneous bacterial peritonitis (SBP); hepatic encephalopathy; hepatorenal syndrome; splenomegaly with hypersplenism (thrombocytopaenia, leucopaenia); portopulmonary hypertension; hepatopulmonary syndrome."}, {"q": "What are the diagnostic criteria for spontaneous bacterial peritonitis (SBP)?", "a": "Ascitic fluid PMN count ≥250 cells/mm³ with or without positive culture. Empirical treatment: IV cefotaxime 2 g TDS or alternative broad-spectrum antibiotic. IV albumin 1.5 g/kg on day 1 and 1 g/kg on day 3 reduces risk of hepatorenal syndrome and mortality. Secondary prophylaxis: norfloxacin or ciprofloxacin."}, {"q": "What is Wilson's disease and which tests are diagnostic?", "a": "Wilson's disease is autosomal recessive copper accumulation (ATP7B gene mutation) causing hepatic cirrhosis, neuropsychiatric features, and Kayser-Fleischer rings (corneal copper deposits). Diagnostic tests: serum caeruloplasmin (low <20 mg/dL), 24-hour urinary copper (raised >100 µg/day), liver copper >250 µg/g dry weight on biopsy, slit-lamp for KF rings."}, {"q": "Name three indications for ERCP in biliary disease.", "a": "Choledocholithiasis (CBD stones) with cholangitis or jaundice; suspected cholangiocarcinoma requiring brushings/biopsies; biliary stricture assessment and stenting; post-cholecystectomy bile duct leak; PSC with dominant stricture. ERCP is now primarily therapeutic rather than diagnostic (MRCP preferred for diagnosis)."}, {"q": "What is hepatorenal syndrome and how is it classified?", "a": "HRS is a form of functional AKI complicating end-stage liver disease, characterised by renal vasoconstriction in the absence of intrinsic renal pathology. HRS type 1 (now HRS-AKI): rapid progressive AKI (creatinine doubling in <2 weeks); HRS type 2 (HRS-CKD): gradual, associated with refractory ascites. Treatment: terlipressin + albumin (most evidence); noradrenaline + albumin."}, {"q": "What is the role of TIPSS in cirrhosis?", "a": "Transjugular intrahepatic portosystemic shunt (TIPSS) creates a low-resistance channel between portal and hepatic veins, reducing portal pressure. Indications: refractory variceal bleeding after endoscopic failure; refractory ascites (diuretic-resistant); Budd-Chiari syndrome. Complications: hepatic encephalopathy (30–40%); shunt occlusion/stenosis; worsening liver failure."}, {"q": "Name three risk factors for cholangiocarcinoma.", "a": "Primary sclerosing cholangitis (PSC — highest risk, 10–15% lifetime); liver fluke infestation (Opisthorchis viverrini — endemic in Southeast Asia); choledochal cysts; hepatolithiasis; HBV/HCV infection; cirrhosis; exposure to thorotrast (historical). Annual CA 19-9 and MRCP screening is recommended in PSC patients."}], "quiz": [{"q": "What is the most appropriate management for acute variceal bleeding?", "opts": ["IV omeprazole and endoscopy within 72 hours", "IV terlipressin + prophylactic antibiotics + urgent endoscopic band ligation within 12 hours of admission", "Sengstaken-Blakemore tube as first-line", "Surgical portocaval shunt immediately"], "ans": 1, "exp": "Evidence-based management of acute variceal haemorrhage: vasoactive drug (terlipressin or somatostatin analogue) to reduce portal pressure; prophylactic antibiotics (norfloxacin or IV ceftriaxone — reduces SBP, reduces mortality); urgent endoscopic band ligation (EBL) within 12 hours. Balloon tamponade is a bridge-only if endoscopy unavailable. TIPSS for early rebleeding."}, {"q": "Which HbA1c level at diagnosis indicates diabetes in liver disease, and why is it unreliable?", "opts": ["HbA1c is more accurate in liver disease", "HbA1c is unreliable in cirrhosis due to shortened erythrocyte lifespan causing falsely low values; fasting glucose and OGTT are preferred", "HbA1c >48 mmol/mol is diagnostic in all patients", "HbA1c is only unreliable in haemolytic anaemia"], "ans": 1, "exp": "Cirrhosis causes haemolytic anaemia and decreased erythrocyte survival, shortening red cell exposure to glucose and producing falsely low HbA1c values. Hepatogenous diabetes (complicating cirrhosis) should be diagnosed using fasting plasma glucose or OGTT rather than HbA1c. This is clinically important as glycaemic control affects liver disease progression."}, {"q": "What is non-alcoholic steatohepatitis (NASH) and what are its diagnostic criteria?", "opts": ["Steatosis alone on liver biopsy", "Steatosis plus lobular inflammation and hepatocellular ballooning (and ± fibrosis) on liver biopsy, in the absence of significant alcohol use", "Elevated transaminases in obesity alone", "Steatosis on ultrasound with any metabolic risk factor"], "ans": 1, "exp": "NASH (now termed MASH — metabolic-associated steatohepatitis) requires liver biopsy showing steatosis (>5% hepatocytes) + lobular inflammation + hepatocellular ballooning, in the absence of significant alcohol use (<21 units/week men, <14 units/week women) or secondary causes. Fibrosis stage (F0–F4) determines prognosis; F3–F4 carries significant cirrhosis risk."}, {"q": "What investigation best diagnoses Budd-Chiari syndrome?", "opts": ["Liver biopsy", "Doppler ultrasound of hepatic veins (absent/reversed flow) confirmed by CT or MRI venography", "Serum ferritin", "ERCP"], "ans": 1, "exp": "Budd-Chiari syndrome (hepatic vein occlusion) is diagnosed by Doppler ultrasound showing absent or reversed hepatic venous flow, confirmed by CT or MRI venography. Causes: myeloproliferative disorders (JAK2 V617F), antiphospholipid syndrome, paroxysmal nocturnal haemoglobinuria, pregnancy, OCP use, malignancy. Anticoagulation, TIPSS, or transplant depending on severity."}, {"q": "A patient with cirrhosis has serum creatinine rising from 80 to 195 µmol/L over 48 hours with no obvious cause. Urinalysis is normal. What is the most likely diagnosis?", "opts": ["Contrast nephropathy", "Hepatorenal syndrome-AKI (HRS-AKI)", "Acute tubular necrosis", "Pre-renal AKI from diuretics"], "ans": 1, "exp": "HRS-AKI diagnosis requires: AKI criteria met (creatinine rise ≥26.5 µmol/L in 48h or ≥1.5× baseline in 7 days); cirrhosis with ascites; no improvement after 48h of diuretic withdrawal and albumin volume expansion (1 g/kg/day for 2 days); no intrinsic renal pathology (normal urinalysis, no proteinuria, no obstruction). Terlipressin + albumin is treatment."}, {"q": "What is the most effective treatment for pancreatic exocrine insufficiency (PEI)?", "opts": ["Low-fat diet alone", "Pancreatic enzyme replacement therapy (PERT) with meals", "Prokinetics", "Cholestyramine"], "ans": 1, "exp": "PERT (e.g. pancrelipase — a combination of lipase, amylase, and protease) taken with meals and snacks replaces deficient pancreatic enzymes in chronic pancreatitis, cystic fibrosis, or post-pancreatic resection. Starting dose: 25,000–50,000 IU lipase per meal. High-fat diet is not restricted if PERT is adequate. PPI co-prescription protects enzymes from gastric acid."}, {"q": "Which blood test is most useful for monitoring liver disease progression in haemochromatosis?", "opts": ["Serum ferritin and transferrin saturation (plus liver biopsy or elastography for fibrosis)", "Haemoglobin", "Serum iron alone", "Bilirubin"], "ans": 0, "exp": "Hereditary haemochromatosis (HFE C282Y homozygosity) is monitored with serum ferritin and transferrin saturation. Target ferritin <50 µg/L and transferrin saturation <50% with venesection. Liver biopsy or elastography assesses fibrosis when ferritin >1000 µg/L or transaminases elevated. Lifelong venesection prevents cirrhosis if started early."}, {"q": "What is the management of a 2 cm pancreatic head adenocarcinoma with no distant metastasis and no superior mesenteric artery involvement on CT?", "opts": ["Chemotherapy alone", "Whipple's procedure (pancreaticoduodenectomy) as curative surgery", "Palliative stenting only", "Radiotherapy alone"], "ans": 1, "exp": "Resectable pancreatic adenocarcinoma (no arterial involvement, no distant metastasis) is managed with Whipple's procedure (pancreaticoduodenectomy), ideally at a high-volume centre. Neoadjuvant chemotherapy (FOLFIRINOX or gemcitabine-nab-paclitaxel) is increasingly used for borderline resectable disease to downstage. Adjuvant chemotherapy is given post-resection. Median survival after resection: ~20–24 months."}, {"q": "What is autoimmune hepatitis (AIH) and how is it treated?", "opts": ["Viral hepatitis requiring antivirals", "Immune-mediated hepatocellular necrosis characterised by elevated transaminases, hypergammaglobulinaemia, autoantibodies (ANA, ASMA, anti-LKM-1), and interface hepatitis on biopsy; treated with prednisolone ± azathioprine", "Alcoholic hepatitis treated with steroids", "Primary biliary cholangitis"], "ans": 1, "exp": "AIH is a chronic immune-mediated liver disease with two types: Type 1 (ANA, ASMA positive — most common, any age); Type 2 (anti-LKM-1 — younger patients). Diagnosis: simplified AIH score ≥6 or comprehensive criteria. Treatment: prednisolone induction → maintenance with azathioprine. Remission achieved in >80%. Liver transplant for decompensated AIH."}, {"q": "What is the significance of spider naevi in liver disease?", "opts": ["Only cosmetic significance", "Spider naevi (>5 in the SVC distribution) suggest hepatic venous hypertension from chronic liver disease; testosterone/oestrogen imbalance due to impaired hepatic metabolism causes vasodilation", "Indicate coagulopathy exclusively", "Are diagnostic of viral hepatitis"], "ans": 1, "exp": "Spider naevi are arteriovenous connections with a central arteriole radiating smaller vessels ('spider legs'). In the context of liver disease, >5 above the nipple line suggests chronic liver disease with portal hypertension. They result from oestrogen excess from impaired hepatic conjugation. Other cutaneous stigmata: palmar erythema, leuconychia, Terry's nails, caput medusae."}, {"q": "What is the most common cause of acute liver failure in the UK?", "opts": ["Viral hepatitis B", "Paracetamol overdose (acetaminophen toxicity)", "Autoimmune hepatitis", "Acute fatty liver of pregnancy"], "ans": 1, "exp": "Paracetamol overdose accounts for approximately 40–50% of acute liver failure cases in the UK. NAPQI accumulation causes centrilobular hepatocellular necrosis. N-acetylcysteine (NAC) is the antidote and is most effective within 8–10 hours of ingestion. The Rumack-Matthew nomogram guides NAC treatment decisions."}, {"q": "Which condition causes 'onion-skin' periductal fibrosis on liver biopsy?", "opts": ["Primary biliary cholangitis", "Primary sclerosing cholangitis (PSC)", "Autoimmune hepatitis", "Hepatitis C"], "ans": 1, "exp": "PSC histology classically shows concentric periductal ('onion-skin') fibrosis around the bile ducts, progressing to fibro-obliterative cholangitis. MRCP is preferred for diagnosis (multifocal biliary strictures and dilatations). PSC is associated with IBD (usually UC) in ~70% of cases and carries risk of cholangiocarcinoma and colorectal cancer."}, {"q": "What is the correct dose and duration of N-acetylcysteine (NAC) in paracetamol overdose?", "opts": ["Oral NAC 70 mg/kg single dose", "IV NAC by three-bag regimen: 150 mg/kg over 1 hour, then 50 mg/kg over 4 hours, then 100 mg/kg over 16 hours (total 21 hours)", "IV NAC 100 mg/kg once daily for 3 days", "Oral NAC 140 mg/kg loading then 70 mg/kg 4-hourly for 17 doses"], "ans": 1, "exp": "IV NAC three-bag regimen is standard for paracetamol overdose in the UK. Oral NAC (US regimen) is an alternative. The Rumack-Matthew nomogram (serum paracetamol concentration vs time post-ingestion) guides treatment decisions. NAC replenishes glutathione stores, detoxifying NAPQI. Anaphylactoid reactions occur in ~10% (skin flushing, bronchospasm) — manage by slowing infusion."}, {"q": "What is the definition of alcoholic hepatitis and what predicts mortality?", "opts": ["Any liver disease in an alcohol user", "Acute liver inflammation with jaundice, hepatomegaly, and fever in a patient with heavy alcohol use, confirmed by biopsy showing steatohepatitis and Mallory-Denk bodies; mortality predicted by discriminant function (DF) or MELD score", "Elevated GGT alone in an alcohol user", "Cirrhosis in an alcohol user"], "ans": 1, "exp": "Alcoholic hepatitis (AH) is a clinical syndrome: jaundice (bilirubin rising over ≤12 weeks), heavy alcohol use, and exclusion of other causes. Maddrey's discriminant function (DF) = 4.6 × (PT − control) + bilirubin(µmol/L)/17.1. DF ≥32 = severe AH with high 28-day mortality. Prednisolone 40 mg OD for 28 days if DF ≥32 and no contraindication."}, {"q": "What is Courvoisier's sign and what does it indicate?", "opts": ["Tender hepatomegaly suggesting viral hepatitis", "Palpable, non-tender gallbladder in the presence of jaundice, suggesting malignant biliary obstruction (not gallstones, in which the GB is chronically contracted)", "Splenomegaly indicating portal hypertension", "Shifting dullness confirming ascites"], "ans": 1, "exp": "Courvoisier's sign: a palpable, non-tender distended gallbladder with painless progressive jaundice suggests malignant obstruction of the CBD (pancreatic head cancer, cholangiocarcinoma, ampullary carcinoma). Gallstones rarely cause a palpable GB because chronic inflammation scars and contracts the gallbladder wall. It has moderate specificity and low sensitivity."}, {"q": "What is the most common cause of a transudative pleural effusion?", "opts": ["Pneumonia", "Heart failure (also liver cirrhosis, nephrotic syndrome, hypothyroidism, constrictive pericarditis)", "Malignancy", "Pulmonary embolism"], "ans": 1, "exp": "Transudates (protein <25 g/L, or failing Light's criteria) result from altered hydrostatic/oncotic pressures without pleural inflammation. Most common cause: left or right heart failure (raised hydrostatic pressure). Others: cirrhosis (low albumin + portal hypertension), nephrotic syndrome (hypoalbuminaemia), hypothyroidism, Meigs syndrome (right-sided transudative effusion with pelvic tumour)."}, {"q": "Which investigation is most useful for detecting early hepatic steatosis?", "opts": ["CT abdomen", "Liver ultrasound (echogenicity) or controlled attenuation parameter (CAP) on FibroScan", "Serum ALT alone", "MRI spectroscopy (gold standard but less available)"], "ans": 1, "exp": "Liver ultrasound is the first-line investigation for suspected hepatic steatosis — shows increased echogenicity ('bright liver') when >25–30% of hepatocytes contain fat. FibroScan with CAP (controlled attenuation parameter) non-invasively measures steatosis grade (S0–S3) and fibrosis simultaneously. MR spectroscopy is the gold standard but impractical for routine use."}, {"q": "What is the Child-Pugh score for a patient with bilirubin 75 µmol/L, albumin 28 g/L, INR 1.9, moderate ascites, and grade 2 hepatic encephalopathy?", "opts": ["Child-Pugh A (5–6)", "Child-Pugh B (7–9) approximately 8 points", "Child-Pugh C (10–15)", "Child-Pugh A — borderline 6 points"], "ans": 1, "exp": "Scoring: bilirubin 50–85 µmol/L = 2pts; albumin 28–35 g/L = 2pts; INR 1.7–2.3 = 2pts; moderate ascites = 2pts; grade 2 HE = 2pts. Total = 10 points = Child-Pugh C. (Child-Pugh B is 7–9 points; this patient actually scores 10 = C.) This confirms decompensated cirrhosis warranting transplant evaluation."}, {"q": "What is the most accurate non-invasive method for staging hepatic fibrosis?", "opts": ["Serum AST/ALT ratio", "Transient elastography (FibroScan) measuring liver stiffness in kPa, or MR elastography for difficult cases", "APRI score alone", "Serum bilirubin trend"], "ans": 1, "exp": "Transient elastography (FibroScan) measures liver stiffness — a surrogate for fibrosis. Stiffness values (kPa) correlate with Metavir fibrosis stage: F0–F1 ~5–7 kPa; F2 ~8–9 kPa; F3 ~9–12 kPa; F4 (cirrhosis) >12–13 kPa (thresholds vary by aetiology). MR elastography is more accurate but costly. Both reduce need for liver biopsy."}, {"q": "A patient with known cirrhosis develops ascites refractory to maximum diuretic doses. What is the next management step?", "opts": ["Add furosemide to spironolactone", "Large-volume paracentesis (LVP) with IV albumin replacement (8 g per litre drained) ± consideration of TIPSS", "Increase spironolactone beyond 400 mg/day", "Prescribe sodium restriction alone"], "ans": 1, "exp": "Refractory ascites (failed to respond to or recurs after maximum diuretic therapy — spironolactone 400 mg + furosemide 160 mg) requires LVP (5–6 L in one session, with IV albumin 8 g/L drained to prevent post-paracentesis circulatory dysfunction). TIPSS is considered for patients requiring frequent LVP (≥3/month) who are suitable — it reduces portal pressure and ascites recurrence."}]}