Wendel 1 reported the first case of acute torsion of the gallbladder. To date, 112 cases of torsion of the gallbladder have been collected from the world literature. In only two cases was a correct preoperative diagnosis made. 2 Report of a Case An 82-year-old woman was admitted to University Hospital on Dec. 22, 1956, because of the sudden onset of right-sided abdominal pain about 30 hours prior to admission. The pain was associated with nausea and bile-stained vomit. The patient had had gallbladder disease 10 or 15 years ago. Four years prior to this admission, at another hospital, a cholecystogram and gastrointestinal x-ray studies were made, results of which are said to have been normal except for gastroptosis. The patient was hypasthenic, with marked thoracic kyphosis. She was moderately dehydrated. The pulse was 100 per minute; blood pressure, 150/80 mm. Hg. Rectal temperature was 101 F (38.2 C). She