High-grade T-cell lymphomas of the small intestine are the most common neoplasms. The intestinal mucosa distant from the tumor contains T cells often of the same clone as the high-grade T-cell lymphoma. It appears that the T-cell lymphoma evolves from reactive intraepithelial lymphocytes through a low-grade lymphocytic neoplasm to a high-grade tumor. Ulcers may appear in the jejunum and are probably part of the same disease process, occurring when the neoplastic T-cells are low grade and recognition of tumor cells in biopsies of the ulcers may be impossible. Patients with enteropathy-associated T-cell lymphoma have genetic markers - the HLA DQA1*0501, DQB1*0201 phenotype, although additional HLA-DR/DQ alleles may represent risk factors for lymphoma development. (see abstract)
Malignancy and survival in dermatitis herpetiformis: a comparison with coeliac disease. - Author Collin P; Pukkala E; Reunala T
- Address Medical School, University of Tampere, Finland.
- Source Gut, 1996 Apr, 38:4, 528-30
Protective effect of gluten-free diet against development of lymphoma in dermatitis herpetiformis.
- Author Lewis HM; Renaula TL; Garioch JJ; Leonard JN; Fry JS; Collin P; Evans D; Fry L
- Source Br J Dermatol, 1996 Sep, 135:3, 363-7
Primary T cell CD30-positive anaplastic large-cell lymphoma associated with adult-onset celiac disease and presenting with skin lesions.
- Author Mantovani G; Esu S; Astara G; Lampis B; MacciÄo A; Usai P; Santa Cruz G; Mura E; Ferreli A
- Source Acta Haematol, 1995, 94:1, 48-51
Study of the immunohistochemistry and T cell clonality of enteropathy-associated T cell lymphoma.
- Author Murray A; Cuevas EC; Jones DB; Wright DH
- Source Am J Pathol, 1995 Feb, 146:2, 509-19
Enteropathy-associated T-cell lymphoma in the West of Ireland: low-frequency of Epstein-Barr virus in these tumors.
- Author Walsh SV; Egan LJ; Connolly CE; Stevens FM; Egan EL; McCarthy CF
- Source Mod Pathol, 1995 Sep, 8:7, 753-7
Premalignant conditions of the small intestine.
Author Ryan JC Source Semin Gastrointest Dis, 1996 Apr, 7:2, 88-93Abstract Cancer of the small intestine is rare compared with other sites in the gastrointestinal tract. Of the four major primary small-bowel tumors (adenocarcinomas, lymphomas, carcinoid, and leiomyosarcomas), adenocarcinomas and lymphomas are associated with diseases that seem to increase the risk of developing these malignancies. In the case of immunoproliferative small intestinal disease and celiac disease, both of which are thought to predispose patients to the development of primary lymphoma, treatment of the predisposing conditions seems to decrease the risk of developing subsequent malignancy. Recognition of the increased risk associated with other conditions, such as immunodeficiency syndromes, nodular lymphoid hyperplasia, Crohn's disease, the gastrointestinal polyposis syndromes, hereditary nonpolyposis colon cancer, neurofibromatosis, long-standing ileostomy, and urinary diversion procedures, may lead to early diagnosis and improved survival.
The gut as a lymphoepithelial organ: the role of intestinal epithelial cells in mucosal immunity.
Author Tlaskalova-Hogenova H; Farre-Castany MA; Stepankova R; Kozakova H; Tuckova L; Funda DP; Barot R; Cukrowska B; Sinkora J; Mandel; L; et al Source Folia Microbiol (Praha), 1995, 40:4, 385-91Abstract Mucosal surfaces covered by a layer of epithelial cells represent the largest and most critical interface between the organism and its environment. The barrier function of mucosal surfaces is performed by the epithelial layer and immune cells present in the mucosal compartment. As recently found, epithelial cells, apart from their participation in absorptive, digestive and secretory processes perform more than a passive barrier function and are directly involved in immune processes. Besides the well known role of epithelial cells in the transfer of polymeric immunoglobulins produced by lamina propria B lymphocytes to the luminal content of mucosals (secretory Igs), these cells were found to perform various other immunological functions, to interact with other cells of the immune system and to induce an efficient inflammatory response to microbial invasion: enzymic processing of dietary antigens, expression of class I and II MHC antigens, presentation of antigens to lymphocytes, expression of adhesive molecules mediating interaction with intraepithelial lymphocytes and components of extracellular matrix, production of cytokines and probable participation in extrathymic T cell development of intraepithelial lymphocytes. All these functions were suggested to influence substantially the mucosal immune system and its response. Under immunopathological conditions, e.g. during infections and inflammatory bowel and celiac diseases, both epithelial cells and intraepithelial lymphocytes participate substantially in inflammatory reactions. Moreover, enterocytes could become a target of mucosal immune factors. Mucosal immunosurveillance function is of crucial importance in various pathological conditions but especially in the case of the most frequent malignity occurring in the intestinal compartment, i.e. colorectal carcinoma. Proper understanding of the differentiation processes and functions of epithelial cells in interaction with other components of the mucosal immune system is therefore highly desirable.
Gluten = Proteins From Cereal GrainsGluten Free: The exclusion of wheat, rye, barley are the initial steps when gluten allergy is suspected. Gluten elimination should be part of a more comprehensive diet revision plan, preferably in the form outlined in the Alpha Nutrition Program. The Program is gluten-free and is recommended as the best diet revision strategy for anyone with diagnosed celiac disease, or any person with symptoms suggestive of gluten allergy. Learn more about the Alpha Nutrition Program Gluten free recipes are found in the book, Alpha Nutrition Cooking and Recipes. |
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