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[Adenocarcinoma of the distal ileal loop: a rare disease at the typical site for Crohn's disease].

The authors report their recent experience in the treatment of two patients respectively affected by Crohn's disease and adenocarcinoma of the terminal ileum. Although with some differences, they presented with radiological, pathological and gross morphological findings quite similar so that the authors concluded for a different clinical stage of Crohn's disease in both cases. Frozen-section examination carried out in one of the two cases, established the correct diagnosis and indicated a wide resection instead of a very limited one. An extremely rare case of primitive adenocarcinoma of the terminal ileum is presented and the literature is reviewed. Features which could help the differential diagnosis between malignant lesions and regional enteritis are therefore focused.