in situ carcinoma biliary tract disorder gallbladder disorder Rokitansky-Aschoff sinuses of the gallbladder intramural diverticulosis of the gallbladder An abnormality characterized by macroscopic or microscopic outpouchings of gallbladder mucosa into the muscle of the gallbladder wall. It may be associated with cholecystitis or gallstones. MONDO:0043291 UMLS:C0267892 Aschoff-Rokitansky sinuses Rokitansky-Aschoff sinuses MEDGEN:78636 MESH:C535869 SCTID:22149007