Courvoiser’s law is related to
**Core Concept**
Courvoisier's law is a clinical correlation related to the pathophysiology of gallstones. It describes the association between a palpably distended gallbladder and the presence of a bile duct obstruction, often due to pancreatic cancer. This law is based on the understanding that a distended gallbladder is a compensatory mechanism for bile duct obstruction.
**Why the Correct Answer is Right**
The distended gallbladder is a result of the body's attempt to store bile in the gallbladder when the bile duct is obstructed. Normally, bile flows from the gallbladder into the bile duct and then into the small intestine for digestion. However, when the bile duct is obstructed, the bile accumulates in the gallbladder, causing it to distend. This is why Courvoisier's law states that a palpably distended gallbladder is often a sign of bile duct obstruction, such as pancreatic cancer. The distension is a compensatory mechanism to accommodate the increased bile volume.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Courvoisier's law specifically refers to bile duct obstruction, not acute cholecystitis. While acute cholecystitis can cause gallbladder distension, it is not the underlying cause of Courvoisier's law.
**Option B:** This option is incorrect because Courvoisier's law is not related to the size of the gallstones. The law is more concerned with the presence of bile duct obstruction rather than the size of the gallstones.
**Clinical Pearl / High-Yield Fact**
Courvoisier's law is a classic clinical correlation that highlights the importance of evaluating the bile ducts in patients with a palpably distended gallbladder. This law is particularly relevant in the context of pancreatic cancer, where bile duct obstruction is a common presenting feature.
**Correct Answer:** C. Courvoisier's law is related to a palpably distended gallbladder in the context of bile duct obstruction, often due to pancreatic cancer.