Abstract
A41-year-old man visited a local physician for fu.rther examination because of positive fecal occult blood the colonoscopic examination indicated a cecal ulceration, and he was referred to our department. He was otherwise healthy without complications from the ulceration. The colonoscopic examination revealed relatively well-defined ulceration covered with a white furry and dirty layer in the cecum. The biopsied samples ebtained trophozeites cf Entamoeba histolytica from the u.lcerated cecal floor histologically demonstrated. A diagnosis of axnehic colitis was made. The ileocecal section is the frequent site of this infection but confined localization to only cecum is rare. With the rnore frequent use of colonoscopy, one may encounter cases of asymptomatic amebic colitis in healthy people lime this case.