In the case reported here the fibromyomatous fundus of the uterus probably entered the sac of the umbilical hernia I 5 months previously. This caused amenorrhea, as in the case of Pullmann (1956), although precisely how is not clear. The severe attack of pain before admission to hospital was due to the uterine torsion and the resulting ischaemia-possibly precipitated by some external force applied to the abdomen, or a sudden muscular effort.
SUMMARYA case is reported in which the uterus, with a large fibromyoma, had been incarcerated in a preexisting umbilical hernia for 15 months. Counterclockwise torsion of the uterus occurred, giving rise to acute symptoms and necessitating operation to remove a gangrenous uterus.