[Malignant lymphoma of the stomach].

Analysing 24 cases of gastric sarcomas of hemopoietic origin (22 non-Hodgkin's lymphomas, 2 Hodgkin's disease) and one instance of plasmacytoma, the authors review the general and radiologic characteristics of such uncommon affections. The gastric localizations of plasmocytic affections are rare, and of them, the ulcerated fungating manifestation of the lesser curvature is the most classical. In the course of Hodgkin's disease, the finding of gastric localization darkens the prognosis since it implies a Stage IV. Because of fibroblastic stroma-response, the images are radiologically similar to adenocarcinoma. On the other hand, the radiologic aspect of gastric localization of non-Hodgkin's lymphoma leads to preoperative diagnosis. -- radiologic images measuring at least 10 cm on their long axis in more than two-thirds of cases, -- clinical-radiologic discrepancy (discreet clinical findings and extensive radiologic evidence), -- infrequent stenotic varieties, -- relatively frequent combined forms (one-third of cases) and eventual simultaneous duodenal localization (about 10%).