Symptomatic Cholelithiasis With Suspected Choledocholithiasis

PATIENT CASE 2 – SYMPTOMATIC CHOLELITHIASIS WITH SUSPECTED CHOLEDOCHOLITHIASIS 🧠 I. ONE-LINER (SGD OPENING) 16-year-old female with severe obesity, presenting with 9 days of epigastric pain radiating to the back, associated with nausea and vomiting, triggered by fatty food, with RUQ tenderness and positive Murphy’s sign, and ultrasound-documented gallstones. 🧠 II. CORE PATHOPHYSIOLOGY (HIGH-YIELD) 🔑 What is happening in this patient? 👉 Gallstones formed → blocked the cystic duct → caused biliary 🔥 WHY THIS PATIENT? (RISK FACTORS) This patient has: ●​ ●​ ●​ ●​ Female Adolescence Family history Severe obesity 👉 These increase cholesterol in bile → stones. 🔥 OBESITY MECHANISM (VERY HIGH-YIELD) Consultants LOVE this. Obesity causes: 1.​ 2.​ 3.​ 4.​ 5.​ Increased cholesterol production by liver Increased cholesterol secretion into bile Bile becomes supersaturated Cholesterol crystals form Stones develop colic → possible transient CBD obstruction. 🧠 EASY ANALOGY Think of the gallbladder as a storage bag for bile.​ When you eat fatty food, the gallbladder squeezes.​ If a stone blocks the exit, pressure builds → pain. ⭐ Consultant Question Why is pediatric gallstone disease increasing? ✔ Rising childhood obesity​ ✔ Sedentary lifestyle​ ✔ High-fat diets 🧠 III. WHY THE PAIN RADIATES TO THE BACK? Because: ●​ Gallbladder shares visceral innervation with the pancreas and posterior structures. ●​ Transient CBD obstruction may stimulate nearby nerves. 🔥 This also raises concern for: ●​ Pancreatitis ●​ CBD stone Important:​ Pain may disappear BUT disease is still present. 🔥 STAGE 3: COMPLICATED Includes: ●​ ●​ ●​ ●​ Acute cholecystitis Choledocholithiasis Pancreatitis Cholangitis This patient is at risk but not yet there. 🧠 IV. STAGING OF GALLSTONE DISEASE (EXAM FAVORITE) 🔥 STAGE 1: ASYMPTOMATIC ●​ Most common ●​ Incidental finding This patient is beyond this. 🔥 STAGE 2: SYMPTOMATIC (CURRENT STAGE) Classic biliary colic: ●​ ●​ ●​ ●​ RUQ or epigastric pain Triggered by fatty food Nausea and vomiting Episodic or persistent ⭐ Consultant Question Why is she still symptomatic even if no pain now? ✔ Stones still present​ ✔ Obstruction is intermittent​ ✔ Disease persists until treated 🧠 V. WHY SUSPECT CHOLEDOCHOLITHIASIS? Even without jaundice: 🔥 Murphy’s Sign Pain when patient inhales while pressing RUQ. Because of: Meaning: ●​ Persistent pain >1 week ●​ Radiation to the back ●​ Possible transient CBD obstruction 👉 Consultants want you to say:​ “High clinical suspicion despite absence of jaundice.” 🧠 VI. KEY HISTORY RED FLAGS (SGD GOLD) Feature 🧠 VII. PHYSICAL EXAM HIGH-YIELD Why Important Fatty food trigger Classic biliary Persistent pain Suggests obstruction Radiation to back Pancreatic or CBD No relief with PPI Not gastritis Family history Obesity ●​ Gallbladder inflammation or irritation. ⭐ Consultant Question What is the mechanism of Murphy’s sign? ✔ Inflamed gallbladder contacts examining hand during inspiration → pain. 🧠 VIII. DIFFERENTIALS (HIGH-YIELD COMPARISON) Condition Key Feature Why ruled out Acute pancreatitis Severe epigastric pain No enzyme elevation Genetic risk Gastritis Burning pain Murphy’s sign Major risk factor Hepatitis RUQ pain + jaundice No jaundice Functional dyspepsia Chronic pain Organic cause seen Appendicitis RLQ No migration 🧠 IX. DIAGNOSTIC FLOWCHART (VERY IMPORTANT) None Abdominal pain in adolescent ↓ RUQ pain + Murphy’s sign ↓ Ultrasound ↓ Gallstones ↓ Check LFTs + bilirubin ↓ Suspect CBD stone? ⭐ Consultant Question What ultrasound findings suggest complications? ✔ Thickened gallbladder wall​ ✔ Pericholecystic fluid​ ✔ Dilated CBD 🧠 XI. WHY ERCP? Gold standard: ●​ Diagnostic ●​ Therapeutic Removes stones. ↓ High risk → ERCP 🧠 X. WHY ULTRASOUND FIRST? Because: ●​ ●​ ●​ ●​ No radiation Cheap Available in PH setting Good sensitivity ⭐ Consultant Question Why not MRCP? ✔ MRCP is diagnostic only​ ✔ ERCP removes stones Used when: ●​ High suspicion of CBD stone. 🧠 XII. MANAGEMENT LOGIC (EXAM FAVORITE) 🔥 Step 1: Stabilize ●​ ●​ ●​ ●​ NPO IV fluids Pain control Antiemetics 🔥 Step 2: Treat infection if suspected Ceftriaxone + Metronidazole. 🔥 Step 3: ERCP Removes obstruction. 🔥 Step 4: Cholecystectomy Prevents recurrence. 🧠 XIII. COMPLICATIONS TO WATCH Consultants LOVE this. ●​ ●​ ●​ ●​ ●​ Acute cholecystitis Pancreatitis Cholangitis Sepsis Biliary cirrhosis ⭐ RED FLAGS ●​ ●​ ●​ ●​ Fever Jaundice Hypotension AMS This is Charcot’s triad or Reynolds pentad. 🧠 XIV. PROGNOSIS Good if treated. ⭐ Consultant Question Why not just ERCP? ✔ Gallbladder still has stones​ ✔ Recurrence is high Poor if: ●​ Delayed ●​ Persistent obesity ⭐ Consultant Question 4.​ Explain gallstone formation. 5.​ How does obesity lead to gallstones? Why control obesity long term? Because: ●​ Recurrence risk ●​ Metabolic syndrome ●​ Fatty liver Management 6.​ Why ERCP before surgery? 7.​ When do you do urgent ERCP? 8.​ Why cholecystectomy after ERCP? Complications 🧠 XV. HIGH-YIELD SUMMARY FOR ORAL DEFENSE 👉 Most common pediatric gallstones = cholesterol​ 👉 Increasing in adolescents due to obesity​ 👉 Ultrasound = first test​ 👉 ERCP = treatment for CBD stones​ 👉 Cholecystectomy = definitive​ 👉 Obesity is a key modifiable risk factor 🔥 XVI. POSSIBLE CONSULTANT QUESTIONS (VERY HIGH-YIELD) Diagnosis 1.​ Why is this not gastritis? 2.​ What features suggest biliary colic? 3.​ Why suspect choledocholithiasis? Pathophysiology 9.​ How do you diagnose cholangitis? 10.​What is the most dangerous complication? 🧠 XVII. QUICK DIFFERENCE TABLE Feature Biliary colic Cholecystiti s Fever No Yes Pain Intermittent Persistent Murphy + ++ Labs Normal Elevated Systemic No Yes