What is the term for a stone obstructing the cystic duct?

The term that refers to a stone obstructing the cystic duct is known as Mirizzi Syndrome. This condition specifically occurs when a gallstone becomes lodged in the cystic duct, which can lead to compression of the common hepatic duct and cause biliary obstruction. Mirizzi Syndrome is notable for its complications, such as jaundice, due to elevated bilirubin levels resulting from the obstructed duct.

Understanding Mirizzi Syndrome is crucial in clinical practice, as it helps differentiate patients who may present with jaundice due to complications related to gallstones lodged not just in the common bile duct but in the cystic duct itself, leading to these secondary complications. In essence, Mirizzi Syndrome emphasizes the need to assess the anatomical relationships of the biliary tree when evaluating patients with gallstone disease.