Figure 1. Acute necrotizing colitis due to invasive amebiasis. A. Marked dilatation of the colon lumen with thickened colonic wall, particularly at the level of the caecum (arrow). B. Colectomy specimen showing diffuse necrosis of the colon. C. Histopathological study of the colon, identifying numerous amebic trophozoites (arrows), with overt pictures of hemophagocytosis (arrowhead).