A type of hyperplastic cholecystitis characterized by a thickened muscularis layer of the gallbladder wall is called what?

A type of hyperplastic cholecystitis characterized by a thickened muscularis layer of the gallbladder wall is called what?

• A. Adenomyomatosis
• B. Rokitansky-Aschoff Sinuses
• C. Biloma
• D. Pneumobilia

Answer: (A)

Adenomyomatosis is a benign hyperplastic change of the gallbladder wall where the mucosa proliferates and the muscularis layer thickens. This thickened muscular wall is the hallmark of the condition. Rokitansky-Aschoff sinuses are mucosal outpouchings that extend into the thickened wall and can form intramural diverticula, helping explain ultrasound findings of cystic spaces within the wall and sometimes comet-tail artifacts. Biloma and Pneumobilia describe other issues (a bile collection outside the gallbladder and air in the biliary tree, respectively) and do not explain a thickened gallbladder wall due to hyperplasia. So the thickened muscularis from adenomyomatosis best fits the description.

Adenomyomatosis is a benign hyperplastic change of the gallbladder wall where the mucosa proliferates and the muscularis layer thickens. This thickened muscular wall is the hallmark of the condition. Rokitansky-Aschoff sinuses are mucosal outpouchings that extend into the thickened wall and can form intramural diverticula, helping explain ultrasound findings of cystic spaces within the wall and sometimes comet-tail artifacts. Biloma and Pneumobilia describe other issues (a bile collection outside the gallbladder and air in the biliary tree, respectively) and do not explain a thickened gallbladder wall due to hyperplasia. So the thickened muscularis from adenomyomatosis best fits the description.