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      18F-Fluorodeoxyglucose PET in a patient with primary small bowel lymphoma: the only sensitive method of imaging.

      The American Journal of Gastroenterology
      Aged, Diagnosis, Differential, Female, Fluorodeoxyglucose F18, diagnostic use, Humans, Intestinal Neoplasms, radionuclide imaging, Intestine, Small, Lymphoma, Non-Hodgkin, Radiopharmaceuticals, Tomography, Emission-Computed

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          Abstract

          This report describes the case of a patient with primary small bowel lymphoma. Well-established methods of imaging did not give a hint on diagnosis. Increased 18F-fluorodeoxyglucose uptake was visualized on performance of positron emission tomography, corresponding with the intraoperatively found tumorous process. The present case points to a potential superiority of positron emission tomography in visualizing primary small bowel lymphoma.

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          Malignant lymphoma of mucosa-associated lymphoid tissue. A distinctive type of B-cell lymphoma.

          As illustrated in the two cases described in this paper close morphologic and immunohistochemical similarities exist between Mediterranean lymphoma (MTL) and primary gastrointestinal lymphoma of follicle center cell (FCC) origin as it occurs in Western countries. Similarities between the two conditions include a dense noninvasive monotypic lamina propria plasma cell infiltrate, present in all cases of MTL and in some cases of Western gastrointestinal FCC lymphoma, and an invasive infiltrate of FCCs morphologically distinct from the plasma cells. A distinctive lesion produced by individual gland invasion characterizes both types of lymphoma. A clonal relationship between the lamina propria plasma cells and the invasive FCCs, long suspected but never proved in MTL, can be demonstrated in Western cases. Many of the histologic and clinical features common to these lymphomas can be explained in the context of the normal maturation sequences of gut associated lymphoid tissue. It is suggested that MTL and Western cases of primary FCC gastrointestinal lymphoma share a common histogenesis from mucosa associated lymphoid tissue.
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            Primary gastrointestinal lymphoma: a 30-year review.

            The authors reviewed all cases of non-Hodgkin's lymphoma primarily involving the gastrointestinal tract treated at Memorial Hospital during the period from 1949-1978. Complete clinical records were available in 104 cases. Slides of original pathology specimens were available in 81 cases. Tumors were classified by Rappaport, Lukes-Collins and modified Kiel classifications. All patients were staged retrospectively, using modified Ann Arbor staging. The primary tumor was in the stomach in 76 patients, in the small bowel in 15 and in the large bowel in 13. The life-table survival for all patients at five years was 44% and for the 81 Stage I and II patients it was 53%. We found a trend toward improved survival for patients treated in the last decade (P = 0.05). Using Cox regression analysis, survival was found to be correlated with stage (P less than 0.0001) and involvement of adjacent structures (P = 0.007). For Stage I patients, resection and radiation therapy were equally effective alone in controlling local tumor even though factors responsible for the selection of either treatment could not be identified. For Stage II patients, resection combined with radiation therapy controlled local disease better than either treatment alone. For Stage II, patient survival was correlated with the pattern of nodal involvement (P less than 0.0001). Neither the choice of treatment (resection, radiation therapy, or resection with radiation therapy; P = 0.17) nor the involvement of resected margins (P = 0.22) affects survival. Among 81 Stage I and II patients, 68% had recurrences outside the primary field of treatment and 60% outside the abdomen. Systemic multiple modality therapy should be considered for patients at high risk for recurrence.
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              Celiac disease and malignancy.

              Fifty-five patients with celiac disease and coexistent malignant disease (27 lymphoma, 28 other malignancies) are described. The important clinical features at presentation of lymphoma were weight loss, abdominal pain, diarrhea, profound weakness and fever, associated with anemia, raised ESR, hypoalbuminemia and steatorrhea. There were no specific features to enable earlier diagnosis. Radiology was unhelpful and in no case were malignant cells seen in the jejunal biopsy. Four of the lymphomas were Hodgkin's disease, none of which involved the bowel; the remainder were reticulum cell sarcoma, 17 of which involved the bowel. Definitive diagnosis prior to death was made in only 18 patients, of whom 16 survived from 2 to 226 days (mean, 76 days). Of the remaining two patients, one is still alive, while the other died 26 years after the original diagnosis of Hodgkin's disease. The possibility of lymphoma should be considered in those who present with celiac disease in middle life and in those who deteriorate for no apparent reason after a period of stability on a gluten-free diet. The index of suspicion for lymphoma in celiac disease should be high and early laparotomy be considered in patients with unexplained deterioration. Twenty-eight patients with 29 carcinomas and 3 other tumors are also described. The presentations of these malignancies were no different from their presentations in non-celiac patients, and their development did not provoke a relapse of celiac disease. Considering the whole series of 55 patients, there was little evidence for the view that malignancy itself was the cause of the flat jejunal mucosal appearances seen in these patients.
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