Pathogenesis of the "Courvoisier gallbladder"

Area of Science:

• Gastroenterology
• Pathophysiology
• Surgical Oncology

Background:

• Courvoisier's law describes gallbladder distension with common bile duct obstruction.
• The traditional explanation involves reduced gallbladder pliability due to chronic inflammation.
• This study re-evaluates the pathophysiological basis of Courvoisier's law.

Purpose of the Study:

• To investigate the pathophysiological basis of Courvoisier's law.
• To determine the factors contributing to gallbladder distension in common bile duct obstruction.
• To differentiate between calculous cholecystitis and periampullary malignancy.

Main Methods:

• Gallbladder size and pliability were measured in patients with chronic calculous cholecystitis (with or without common duct obstruction), periampullary malignancy, and normal controls.
• Jaundice duration and level were correlated with gallbladder size and intraoperative ductal pressure.

Main Results:

• Gallbladder pliability was uniform across all study groups in vitro.
• Patients with dilated gallbladders exhibited significantly higher ductal pressure.
• A longer history and deeper jaundice were associated with dilated gallbladders.

Conclusions:

• The classical explanation of reduced gallbladder pliability is not supported by these findings.
• Chronically elevated ductal pressure is the probable cause of gallbladder dilation in malignant common duct obstruction.
• This challenges the traditional understanding of Courvoisier's law.