Omphalolith presented with peritonitis: a case report.

Omphalolith is a hard, smooth, almost black bolus found in the umbilicus, resembling a malignant melanoma. It is often accompanied by seborrhea which may lead to abscess formation. It may be related to poor hygiene. Patient is usually complaining of umbilical discharge and pain. This report describes a rare case of omphalolith (umbilical stone) induced peritonitis, in a patient who presented as acute appendicitis. In our case the two umbilical stones found their way to the peritoneal cavity and induced peritonitis.