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[Primary lymphoma of the small bowel and malabsorption].

Between 1974 and 1984 we saw 69 patients with lymphoma that involved the gastrointestinal tract. In ten patients the lymphoma compromised the small bowel and were associated to malabsorption. Seven patients fulfilled the criteria to be considered as primary small bowel lymphoma. We presumed the intestinal origin in the other 3 patients, but it was impossible to confirm it. The peroral small bowel biopsy showed histological findings compatible with celiac disease in 7 patients. Other particular histological signs were patchy alterations, inconstant epithelial pseudo-stratification and ulcerations. In 2 cases we found findings that suggested the diagnosis of lymphoma. In 50% of patients we found unspecific malabsorption signs in the small bowel radiology. We found giant ulcers and stenosis too. The gluten-free diet or the steroid therapies resulted in temporary or inconstant improvement. The laparotomy was the most effective diagnostic approach. It was performed electively in 6 patients and in 1 because of a small bowel perforation. The primary small bowel lymphoma is an entity of difficult diagnosis. The most important trouble is to differentiate it with celiac disease.