EDITORIAL SYNOPSIS Two cases of torsion of the gall bladder, both associated with lax mesenteries, one with and one without a stone, are reported. It is remarkable that two such rare cases should be admitted under the care of one surgeon within two years. Operative findings at laparotomy (right upper paramedian) were thin sanguinous, mostly subhepatic, free peritoneal fluid. The gall bladder was hugely distended, dark, and twisted clock-wise one and a half times on its mesentery. After untwisting, it was found to have a mesentery clothing nearly the whole organ and measuring nearly 2 in. in width (from the under surface of the liver to the gall bladder). There was a large (nearly 3 in. in its greatest diameter) solitary stone inside the gall bladder.