Necrotizing amebic colitis with pseudomembrane formation

We report a case of necrotizing amebic colitis with the sigmoidoscopic finding of a confluent, grayish pseudomembrane. The patient was referred from a chronic mental institution, which represents the patient population most susceptible to fulminant amebic dysentery in the United States. The pseudomembrane was a reflection of extensive mucosal necrosis and resolved with amebicidal therapy.