Okay, let's tackle this question. The patient is a 36-year-old woman with progressive symptoms of itching, weight loss, fatigue, and yellow sclerae. She has jaundice and steatorrhea. Lab results show high cholesterol, elevated alkaline phosphatase, and normal AST/ALT. The cholangiogram is normal, but she's positive for antimitochondrial antibodies.

First, I need to figure out the diagnosis. The key points here are the positive antimitochondrial antibodies (AMA), elevated alkaline phosphatase, and the symptoms. AMA is a hallmark of primary biliary cholangitis (PBC), formerly called primary biliary cirrhosis. PBC is an autoimmune disease that affects the small bile ducts in the liver. The elevated alkaline phosphatase is due to cholestasis, which is common in PBC. The normal AST and ALT suggest that there's not a lot of hepatocellular damage, which makes sense because PBC is a cholestatic disease.

The patient's symptoms like itching and jaundice are due to the buildup of bile salts in the blood. Steatorrhea is because of malabsorption due to fat-soluble vitamin deficiencies from impaired bile flow. The high cholesterol might be because of the liver's altered metabolism in PBC.

The question is about what a liver biopsy would show. In PBC, the liver biopsy typically shows non-suppurative destructive cholangitis. The hallmark is the presence of granulomas around the small bile ducts. The granulomas are a type of inflammatory response targeting the bile ducts, leading to their destruction. Over time, this leads to fibrosis and cirrhosis.

Looking at the options, the correct answer would be the one mentioning granulomatous inflammation of the bile ducts. The other options might include features of other liver diseases. For example, if an option mentions viral hepatitis, it's incorrect because PBC is autoimmune. If an option mentions steatosis or Mallory bodies, those are more typical of alcoholic or non-alcoholic fatty liver disease. Another option might mention large bile duct obstruction, but the cholangiogram was normal, so that's not the case here.

The key here is the presence of AMA and the biopsy findings. The granulomas in the bile ducts are specific to PBC. The clinical pearl is that antimitochondrial antibodies are almost pathognomonic for PBC, and the liver biopsy shows granulomas around the small bile ducts. This is a high-yield fact for exams because it's a classic presentation.

**Core Concept**
This question tests the pathophysiology and diagnostic features of **primary biliary cholangitis (PBC)**, an autoimmune cholestatic liver disease. Key markers include **antimitochondrial antibodies (AMA)** and **non-suppurative granulomatous inflammation** of small bile ducts on biopsy.

**Why the Correct Answer is Right**
The patient’s clinical presentation (pruritus, jaundice, steatorrhea), lab findings (elevated alkaline phosphatase, normal AST/ALT), and positive AMA confirm PBC. Liver biopsy in PBC classically reveals **granulomatous destruction of small intrahepatic bile ducts** with **lymphocytic infiltration** and **epithelioid

✓ Correct Answer: D. Intrahepatic bile duct damage