[Gallbladder volvulus].

We report two new cases of gallbladder volvulus. This rare condition principally affects elderly patients but is due to a congenital malformation related to the presence of a long mesocyst. Various factors such as kyphoscoliosis, multiparity and peristalsis of neighbouring organs favorise the occurrence of volvulus, the role of lithiasis is debatable. The diagnosis may be suggested on ultrasound but is most often confirmed at laparotomy. Diagnosis should be made rapidly in order to avoid progression towards a potentially fatal secondary peritonitis. Certain clinical elements such as the presence of a "floating mass" on palpation may suggest the diagnosis.