A "fixed" filling defect in the gallbladder.
D002765:Cholecystography; D003937:Diagnosis, Differential; D005260:Female; D005705:Gallbladder Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D005706:Gallbladder Neoplasms / Q000000981:diagnostic imaging*; D006801:Humans; D006965:Hyperplasia; D008875:Middle Aged