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S Vinzio B Goichot E Krebs-Wurtz R Herbrecht M Imler 《Canadian Metallurgical Quarterly》1998,27(20):963-964
BACKGROUND: Early manifestations of primary lymphomas of the digestive tract generally include general signs and abdominal pain. Diarrhea is uncommon and may result from several mechanisms. We report a case of primary lymphoma of the digestive tract in a patient presenting exsudative enteropathy. CASE REPORT: A 68-year-old woman was hospitalized for profuse diarrhea of 15 days duration. Laboratory tests showed major hypoalbuminemia. Malabsorption could not be evidenced and no infectious foyer was found. Biopsies at different levels of the digestive tract showed mucosal invasion by MALT type B-cell lymphoma. The clinical course was initially favorable after chemotherapy. DISCUSSION: Classification of digestive tract lymphomas differentiates MALT type B-cell lymphoma (the most frequently encountered type in western countries), Mediterranean lymphomas, and T-cell lymphomas generally complicating coeliac disease. MALT type lymphomas may occur in association with Helicobacter pylori infection, usually in a gastric localization. Multiple localizations are uncommon and diffuse involvement of the digestive tract as in our observation appears exceptional. This extension would explain the exsudative enteropathy which regressed with chemotherapy. 相似文献
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Analytical formulas for distortions permitting the calculation of composite second order (CSO) and composite triple beat (CTB) in distributed feedback (DFB) laser diodes are given, including gain compression and longitudinal spatial hole burning (LSHB). An improved chirp expression including both effects is also proposed. Gain compression is compared to LSHB over the CATV band: LSHB effects on distortion and chirp are found to be dominant in actual CATV lasers. Nonmonotonous behavior (dips) function of frequency and bias current is verified in second- and third-order distortions in agreement with recent results 相似文献
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