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American Journal of Pathology, Vol 135, 281-289, Copyright © 1989 by American Society for Investigative Pathology

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Malignant lymphoma of the gastrointestinal tract and mesentery. A clinico-pathologic study of the significance of histologic classification. NHL Study Group of the Comprehensive Cancer Center West

JH van Krieken, R Otter, J Hermans, K van Groningen, PJ Spaander, MM van de Sandt, JF Keuning and PM Kluin
Department of Pathology, University Hospital Leiden, The Netherlands.

A series of 92 malignant lymphomas of the gastrointestinal tract and mesentery obtained from a population-based registry was studied to assess whether the newly defined concept of mucosa-associated lymphoma has clinical relevance. The cases were grouped according to localization; gastric, intestinal, and mesenteric lymphoma. All cases were reviewed histologically, graded according to the Working Formulation, and reclassified according to the Kiel classification, which was modified to include the categories low- and high-grade mucosa- associated lymphoma. Clinical data, as well as staging and follow-up data, were related to both the original diagnosis and the diagnosis after reclassification. The results showed that the distribution of the types of lymphoma is related to site: centroblastic lymphoma was predominant in the stomach, lymphoblastic in the bowel, and follicular centroblastic-centrocytic in the mesentery. Gastrointestinal lymphoma was disseminated in approximately 50% of the patients at presentation. Survival analysis revealed that classification according to the original Kiel classification and grading according to the Working Formulation provided important prognostic information, whereas introduction of mucosa-associated lymphoma as an entity did not. It was concluded that modification of current classifications to include a separate category for mucosa-associated lymphoma is not useful.




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Copyright © 1989 by the American Society for Investigative Pathology.