Most common surgical cause of obstructive jaundice?
**Core Concept**
Obstructive jaundice occurs due to a blockage in the bile ducts, preventing the flow of bile into the intestine. This can lead to a buildup of bilirubin, causing jaundice.
**Why the Correct Answer is Right**
The most common surgical cause of obstructive jaundice is a gallstone blocking the common bile duct. This occurs when a gallstone, typically formed from cholesterol, becomes lodged in the common bile duct, preventing bile from flowing into the intestine. The common bile duct is a narrow tube that carries bile from the liver and gallbladder into the small intestine. A blockage in this duct can lead to obstructive jaundice.
**Why Each Wrong Option is Incorrect**
**Option A:** Pancreatitis is a painful inflammation of the pancreas, often caused by gallstones, but it is not a direct cause of obstructive jaundice.
**Option B:** Liver cancer is a primary malignancy of the liver, which can cause jaundice due to liver dysfunction, but it is not typically associated with obstructive jaundice.
**Option C:** Cholangiocarcinoma is a rare cancer of the bile ducts, which can cause obstructive jaundice, but it is much less common than gallstones.
**Clinical Pearl / High-Yield Fact**
Gallstones are a common cause of obstructive jaundice, and prompt diagnosis and treatment are essential to prevent complications such as pancreatitis and secondary bacterial infections.
**Correct Answer:** C. Cholangiocarcinoma is a rare cancer of the bile ducts, which can cause obstructive jaundice, but it is much less common than gallstones.