title: Gallbladder polyp mimicking an obstructive calculus.
abstract: The second documented case of obstructing polyp of the gallbladder-an extremely rare lesion-is presented. Symptoms were indistinguishable from those of acute obstructive cholecystitis. The mechanism of obstruction is hypothesized.
mesh_terms: D000328:Adult; D002769:Cholelithiasis / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005706:Gallbladder Neoplasms / Q000175:diagnosis* / Q000601:surgery; D006801:Humans; D008297:Male; D011127:Polyps / Q000175:diagnosis* / Q000601:surgery