Diffuse histiocytic lymphoma involving the gastrointestinal tract

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Abstract
The results of staging and treatment of 18 patients with diffuse histiocytic lymphoma involving the gastrointestinal tract are summarized. Widespread disease (Stage IV) was found in the majority (72%) of patients after rigorous staging, indicating the relative rarity of localized gastrointestinal lymphoma and the resulting need for systemic therapy in most of these patients. Chemotherapy combined with surgical resection and/or radiation therapy produced complete remissions in only 5 of 18 patients (28%). Patients failed to achieve complete remission due to 1) tumor resistance to drug therapy (46% of treatment failures), and 2) massive intestinal hemorrhage or bowel perforation secondary to tumor necrosis (38% of treatment failures). These finding indicate the need for more active chemotherapeutic regimens and for measures aimed at preventing complications such as bowel perforation or hemorrhage, possibly by combining surgical resection of bowel lesions with systemic chemotherapy.

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