Right abdominal mass: keep an open mind.

Amebic colitis is common in tropics, usually presenting with variable and non-specific symptoms. Amebomas occur rarely, usually in cecum and ascending colon, when they can masquerade as colon carcinoma. This report describes the case of a 27-year-old male who presented with right abdominal mass. Radiological examination prompted us to the differential diagnosis of ameboma and he was treated with metronidazole and broad-spectrum antibiotics for two weeks. Amebic colitis should be considered as a possible diagnosis when dealing with right-sided abdominal mass.