A 58-year-old man from Delhi presents with progressive jaundice for 3 weeks, dark urine, and pale stools. He denies fever or abdominal pain. On examination, he is afebrile with a palpable gallbladder and no hepatomegaly. Serum bilirubin is 8.2 mg/dL (conjugated 7.1), ALP 320 IU/L, ALT 85 IU/L. Ultrasound shows dilated intrahepatic and extrahepatic bile ducts with a 2.5 cm stone in the common bile duct, and a normal-sized gallbladder with no stones. What is the most appropriate next step in surgical management?

Explanation

## Clinical Scenario Analysis This patient presents with **obstructive jaundice from choledocholithiasis** (CBD stone) with a normal gallbladder—a case of **primary CBD stone** or **retained stone after previous cholecystectomy**. ### Key Diagnostic Features **High-Yield:** The constellation of: - Progressive jaundice without fever (no cholangitis) - Pale stools and dark urine (complete biliary obstruction) - Palpable gallbladder (Courvoisier sign suggests distal obstruction, not gallstone pancreatitis) - Normal-sized gallbladder on ultrasound with CBD stone - Conjugated hyperbilirubinaemia with elevated ALP confirms **obstructive jaundice from CBD stone without acute cholangitis**. ### Surgical Workup Algorithm ```mermaid flowchart TD A["Obstructive jaundice + CBD stone on imaging"]:::outcome --> B{"Acute cholangitis?"}:::decision B -->|"Yes (fever + Charcot triad)"| C["Emergency drainage: ERCP or PTC"]:::urgent B -->|"No fever, stable"| D{"Gallbladder present?"}:::decision D -->|"Yes (normal GB)"| E["Primary CBD stone"]:::outcome D -->|"No (post-cholecystectomy)"| F["Retained/recurrent stone"]:::outcome E --> G["ERCP + sphincterotomy + extraction"]:::action F --> G G --> H["Stone cleared?"]:::decision H -->|"Yes"| I["Discharge, reassess for surgery"]:::outcome H -->|"No or large stone"| J["Surgical CBD exploration"]:::action ``` ### Why ERCP First? **Key Point:** In the **absence of acute cholangitis**, ERCP with endoscopic sphincterotomy (EST) and stone extraction is the **gold standard first-line intervention** for CBD stones, regardless of gallbladder status. **Clinical Pearl:** ERCP success rate for CBD stone extraction is 85–95% in uncomplicated cases. It is: - Minimally invasive - Diagnostic and therapeutic - Avoids operative morbidity in an elderly patient - Can be repeated if needed **High-Yield:** Open choledochotomy or laparoscopic exploration are reserved for: 1. ERCP failure or contraindication 2. Anatomical variations (altered anatomy post-surgery) 3. Large stones (>15 mm) not amenable to EST 4. Intrahepatic stones ### Management Sequence | Step | Indication | Action | |------|-----------|--------| | **1st** | Uncomplicated CBD stone, no cholangitis | ERCP + EST + extraction | | **2nd** | ERCP success | Discharge; reassess for elective cholecystectomy if GB present | | **3rd** | ERCP failure or contraindication | Surgical CBD exploration (open or lap) | | **Urgent** | Acute cholangitis with sepsis | Emergency drainage (ERCP or PTC) | **Mnemonic:** **ERCP-FIRST** — *Endoscopic* Retrograde *Cholangiopancreatography* is *First* in *Iatrogenic* *Retained* or *primary* *Stones* (no cholangitis). [cite:Sabiston Textbook of Surgery 21e Ch 54]