A 62-year-old woman with a history of recurrent cholangitis presents with fever (38.5°C), right upper quadrant pain, and jaundice. Laboratory tests show bilirubin 7.4 mg/dL, alkaline phosphatase 380 IU/L, and WBC 14,200/μL. Abdominal ultrasound reveals dilated intrahepatic bile ducts with multiple echogenic foci within the ducts, a normal-caliber common bile duct, and a normal gallbladder. What is the most likely diagnosis, and what is the immediate management priority?

Explanation

## Clinical Scenario Interpretation Key diagnostic clues: - **Recurrent cholangitis** (fever, jaundice, RUQ pain) - **Dilated intrahepatic bile ducts** with echogenic foci (stones) - **Normal-caliber CBD** (excludes extrahepatic obstruction) - **Normal gallbladder** (excludes gallstone disease as primary) This constellation is pathognomonic for **intrahepatic cholangitis with stones** (also called **Oriental cholangiohepatitis** or **recurrent pyogenic cholangitis**). ## Why PTC with Drainage is the Correct Answer **High-Yield:** Intrahepatic cholangitis differs fundamentally from choledocholithiasis: | Feature | Choledocholithiasis | Intrahepatic Cholangitis | |---------|-------------------|------------------------| | **Duct involved** | CBD (extrahepatic) | Intrahepatic ducts | | **Stone location** | CBD | Within liver parenchyma | | **ERCP access** | ✓ Direct visualization | ✗ Cannot reach intrahepatic ducts | | **First-line therapy** | ERCP + sphincterotomy | PTC + drainage ± stone extraction | | **Associated findings** | Gallstones common | Strictures, dilated ducts, recurrent infections | **Key Point:** ERCP visualizes the CBD and ampulla but **cannot access intrahepatic ducts**. In intrahepatic cholangitis, stones are lodged upstream in the liver ducts — ERCP will fail. **Clinical Pearl:** The **normal-caliber CBD** is the critical finding that excludes choledocholithiasis and points to intrahepatic pathology. If the CBD were dilated with stones, ERCP would be appropriate. ## Management Algorithm for Obstructive Jaundice with Cholangitis ```mermaid flowchart TD A[Fever + jaundice + dilated ducts]:::outcome --> B{Dilated CBD?}:::decision B -->|Yes| C{Stones visible?}:::decision C -->|Yes| D[ERCP + sphincterotomy + extraction]:::action C -->|No| E[ERCP + sphincterotomy for stricture]:::action B -->|No, intrahepatic ducts dilated| F{Acute cholangitis?}:::decision F -->|Yes| G[PTC with drainage tube]:::action F -->|No| H[Elective PTC or surgical planning]:::action ``` **Mnemonic:** **CHOP** for intrahepatic cholangitis: - **C**holangitis (recurrent) - **H**epatic ducts dilated - **O**riental (endemic in East Asia, but occurs worldwide) - **P**TC (percutaneous transhepatic cholangiography) — first-line drainage ## Why Immediate Drainage is Critical 1. **Acute cholangitis is a surgical emergency** — sepsis risk is high 2. **Decompression** of infected ducts prevents further bacterial translocation 3. **PTC allows simultaneous diagnosis and therapy** — imaging + drainage catheter 4. **Definitive stone extraction** can be planned after acute phase resolves [cite:Sabiston Textbook of Surgery Ch 56; Harrison 21e Ch 340]