Ultrasonographic appearance of appendiceal endometrioma

Endometriosis may involve the gastrointestinal tract, but only rarely is the appendix affected. The authors report the ultrasonographic appearance of appendicular endometriosis, which was unexpectedly discovered in a 31-year-old woman. The lesion was also demonstrated by computed tomography and an upper gastrointestinal tract radiographic series after barium ingestion. The diagnosis was confirmed by surgery. The authors believe this to be the first description of the ultrasonographic appearance of appendicular endometriosis.