A Case of Gallbladder Adenosquamous Carcinoma Diagnosed Accidentally After Surgery for Gallbladder Torsion

Abstract

A 91-year-old woman was referred to our hospital with acute upper abdominal pain and a painful mass in the abdomen. Abdominal computed tomography revealed gallbladder swelling, and narrowing from the neck to the duct, with inward deviation. A provisional diagnosis of gallbladder torsion was made, and laparoscopic cholecystectomy was performed. Intraoperative findings revealed incomplete gallbladder torsion, and examination of the resected specimen revealed an elevated lesion at the fundus of the gallbladder. Histopathologically, the gallbladder showed infarct changes, and the neoplastic lesion at the fundus was diagnosed as an adenosquamous carcinoma. It is very rare for the diagnosis of gallbladder adenosquamous carcinoma to be made accidentally, after surgery, in a patient presenting with gallbladder torsion. Therefore, we report this case herein.