Primary Follicular Lymphoma of the Gastrointestinal Tract
ABSTRACT Follicular lymphoma (FL), a common nodal lymphoma, is rare in the gastrointestinal (GI) tract. We report our experience with primary FL of the GI tract.
The surgical pathology computer files at the Massachusetts General Hospital were searched for cases of FL involving the GI tract. Patients were included if on staging, the major site of disease was the GI tract. Thirty-nine cases were identified. Clinical data were collected from electronic medical records.
The 27 women and 12 men ranged in age from 29 to 79 years (median, 59 y). Thirty tumors involved the small bowel (19 the duodenum); 8 involved the colon; and 1 involved the stomach. Eight of 10 tumors that were resected involved the small bowel (jejunum and/or ileum without duodenum) of which 5 presented with intestinal obstruction. All tumors were grade 1 or 2. Immunostains showed consistent expression of CD20 (100%), CD10 (97%), and Bcl-2 (97%). Among the 34 cases with Ann Arbor staging information, 22 were stage I, 10 were stage II, and 2 were (6%) stage IV. Of 36 cases with follow-up (median, 4.5 y), 27 patients are alive without disease, 7 are alive with disease, and 2 died of other causes. No lymphoma-related deaths were recorded.
Primary FL of the GI tract occurs most often in middle-aged adults with a 2:1 female preponderance. The most frequent site of involvement is the duodenum, followed by the ileum and colon. Distal small bowel involvement is more likely to present as bowel obstruction requiring resection. The disease is localized in the bowel and regional lymph nodes in the vast majority of cases. The prognosis is favorable even when the disease is disseminated.
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ABSTRACT: There are no "benign lymphomas", a fact due to the nature of lymphoid cells to circulate and home as part of their normal function. Thus, benign clonal expansions of lymphocytes are only rarely recognized when localized. Recent studies have identified a number of lymphoid proliferations that lie at the interface between benign and malignant. Some of these are clonal proliferations that carry many of the molecular hallmarks of their malignant counterparts, such as BCL2/IGH and CCND1/IGH translocations associated with the in situ forms of follicular lymphoma and mantle cell lymphoma, respectively. There are other clonal B-cell proliferations with low risk of progression; these include the pediatric variants of follicular lymphoma and marginal zone lymphoma. Historically, early or incipient forms of T/NK-cell neoplasia also have been identified, such as lymphomatoid papulosis and refractory celiac disease. More recently an indolent form of T-cell lymphoproliferative disease affecting the gastrointestinal tract has been described. Usually, CD8(+), the clonal cells are confined to the mucosa. The clinical course is chronic, but non-progressive. NK-cell enteropathy is a clinically similar condition, composed of cytologically atypical NK-cells that may involve the stomach, small bowel or colon. Breast implant-associated anaplastic large cell lymphoma is a cytologically alarming lesion that is self-limited if confined to the seroma cavity. Atypical lymphoid proliferations that lie at the border of benign and malignant can serve as instructive models of lymphomagenesis. It is also critical that they be correctly diagnosed to avoid unnecessary and potentially harmful therapy.Haematologica 09/2014; 99(9):1421-1432. DOI:10.3324/haematol.2014.107938 · 5.87 Impact Factor
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ABSTRACT: A 62-year-old Japanese male was diagnosed with primary intestinal follicular lymphoma involving the duodenum, jejunum, and rectum without lymph node involvement. The patient was classified as low risk by the follicular lymphoma international prognostic index (FLIPI) system. Treatment was deferred because he had no symptoms. Eleven months after the diagnosis, his soluble interleukin-2 receptor (sIL-2R) levels had risen from 383 to 617 U/mL. Lymphoma progression involving an enlarged perigastric lymph node was also documented. This report illustrates a case of rapidly progressed intestinal follicular lymphoma, suggesting the possible usefulness of sIL-2R levels as an indicator of lymphoma progression.04/2014; 2014:549248. DOI:10.1155/2014/549248
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ABSTRACT: A large variety of lymphoma types may develop as primary intestinal neoplasms in the small intestines or, less often, in the colorectum. Among these are a few entities such as enteropathy-associated T-cell lymphoma or immunoproliferative small intestinal disease that, essentially, do not arise elsewhere than in the gastrointestinal tract. In most instances the primary intestinal lymphomas belong to entities that also occur in lymph nodes or other mucosal sites, and may show some peculiar features. In the case of follicular lymphoma, important differences exist between the classical nodal cases and the intestinal cases, considered as a variant of the disease. It is likely that the local intestinal mucosal microenvironment is a determinant in influencing the pathobiological features of the disease. In this review we will present an update on the clinical, pathological and molecular features of the lymphoid neoplasms that most commonly involve the intestines, incorporating recent developments with respect to their pathobiology and classification. We will emphasize and discuss the major differential diagnostic problems encountered in practice, including the benign reactive or atypical lymphoid hyperplasias, indolent lymphoproliferative disorders of T or natural killer (NK) cells, and Epstein–Barr virus (EBV)-related lymphoproliferations.Histopathology 01/2015; 66(1). DOI:10.1111/his.12596 · 3.30 Impact Factor