Apple Core Appearance
Aetiology Large adenocarcinoma, especially in the left colon, which may obstruct the faecal flow, resulting in pencil-thin stools. The lesion may be partially mimicked by concentric amebomas in Entamoeba histolytica granulomas, by exuberant submucosal fibrosis in Crohn’s disease, by stenosing fibrotic stages of diverticulosis coli, and may occur in small intestinal adenocarcinoma
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