Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0079731 (B-cell lymphoma)
 16,671 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

B cell lymphoma arising in skeletal muscle is described with the review of literature. A 72-year-old man visited our hospital on September 21st 1992, because of a right temporal mass which had grown gradually since one year previously. A CT scan and MRI showed a soft tissue mass adjacent to the temporal muscle expanding from the right temporal to infratemporal fossa. Physical examination on admission revealed that the mass at the right temporal region, was non-tender, elastic soft, and 5 x 2 cm in diameter. Some elastic hard masses at the right infraauricular region, approximately 1.5 x 1.2 cm in diameter, were also found. Histological examination of a biopsied specimen obtained from the temporal mass revealed B cell lymphoma, diffuse medium-sized cell type. Tests for surface markers using tumor cell suspension showed positive results for CD5, CD19, CD20, SmIg mu, delta, lambda, but negative for CD10. Chromosomal analysis revealed clonal aberrations, and the defining karyotype as 51, X, +X, -Y, +2, +3, +4, +8, +12. The patient achieved a complete remission after treatment with combination chemotherapy including doxorubicin, cyclophosphamide, vincristine, etoposide, vindesine, procarbazine, and prednisolone.
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PMID:[B-lymphoma arising in the temporal muscle]. 793 63

Synchronous cutaneous T-cell lymphoma and low-grade B-cell lymphoproliferative disorders have rarely been reported in the same patient. Coexpression of each phenotype in the same lymph node has not, to our knowledge, been previously documented. We describe an 86-year-old man with chronic pruritus and erythroderma and recent-onset peripheral lymphadenopathy and lymphocytosis. Lymph node biopsy provided morphological and immunohistochemical evidence of concurrent small B lymphocytic lymphoma and small pleomorphic T-cell lymphoma. Immunophenotyping of nodal lymphocytes demonstrated two distinct clones: IgM-kappa B-cells with CD5 positivity and CD7 negative T-helper cells. Both immunoglobulin (heavy and light chains) and T-cell receptor (beta I and beta II) gene rearrangements were detected by Southern blot analysis of the lymph node. In contrast, the immunophenotype of lymphocytes from peripheral blood and bone marrow was exclusively that of T-helper cells with atypical CD7 deletion. Electron microscopic examination of circulating lymphocytes revealed small cerebriform Sezary cells. This case demonstrates that small lymphocytic lymphoma may coexist intranodally with cutaneous T-cell lymphoma as a unique form of composite T- and B-cell lymphoma.
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PMID:Composite cutaneous T-cell lymphoma and small B-cell lymphocytic lymphoma: morphologic, immunologic, and molecular genetic documentation of concurrent lymph node involvement. 799 22

In lymphoproliferative diseases of the skin, DC have a key role in T- and B-cell homing. Furthermore, DC alterations may have a pathogenic role in the natural history of specific disorders, either in the neoplastic lymphoid cell progression or in antitumoral lymphocyte reaction. Finally, the morphoantigenic and topographic features of DC may have diagnostic and histogenetic relevance in specific conditions. In CTCL, dermal CD1a+ DC ("indeterminate cells") seem to play a significant role in the neoplastic progression of MF, whereas the possible pathogenetic role of specific alterations of epidermal LC is yet to be proven. Recently, a possible implication of DD (resident, perivascular factor XIIIa+/CD1a- DC) in the pathogenesis of MF has been also suggested. The presence and possible significance of DC in CTCL non-MF are presently poorly studied. At present, DC number, distribution, and phenotype seem possibly useful in the differential diagnosis between CTCL and pseudo-CTCL, but this hypothesis has to be adequately confirmed. CBCL has been recently proposed as a unique type of clinically low-grade lymphoma, namely, skin-associated lymphoid tissue (SALT)-related B-cell lymphoma. Both SALT- and mucosa-associated lymphoid tissue (MALT)-related B-cell lymphoma share with a peculiar nodal lymphoma of follicle mantle origin (parafollicular-monocytoid lymphoma) the nonaggressive clinical behavior and the uniform phenotype (CD5-, CD10-) and genotype (lack of bcl-2 gene rearrangement) of neoplastic B cells, despite the wide variability of cytomorphologic appearances. The putative origin of CBCL is further supported by the typical CD14-, nerve growth factor receptor (NGFr)+ immunophenotype of DRC. Moreover, the immunophenotype and architectural fashion of DRC are interesting clues to the differentiation between neoplastic and true reactive folliclelike nodules and may be of help in the differential diagnosis between CBCL and B-cell pseudolymphoma as well as in the correct interpretation of lesions showing monoclonal proliferations of B cells accompanied by polyclonal follicular reactions.
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PMID:Dendritic cells in T- and B-cell proliferation in the skin. 804 37

The CD5+ B cell lymphoma clone, CH12.LX, endogenously produces IL-4. Blocking the binding of this IL-4 to its cellular receptor inhibited the continuous proliferation of CH12.LX. mAb specific for either IL-4 or the IL-4R profoundly and specifically inhibited the proliferation of CH12.LX cells in a concentration-dependent manner, within 4 h after the addition of mAb. The addition of exogenous rIL-4 alone to CH12.LX cells had no effect on either proliferation or antibody secretion. However, exogenous rIL-4 was able to counteract the effects of anti-IL-4 antibody. Treatment of CH12.LX cells with antisense RNA oligodeoxynucleotides to IL-4 also specifically inhibited cell proliferation and decreased the levels of IL-4 secreted into the culture supernatants by more than 50%, without effect on total RNA or protein synthesis. Effects of antisense IL-4 were also blocked by addition of exogenous IL-4. Control oligodeoxynucleotides of equal size and base composition had no effect, and IL-4 antisense oligodeoxynucleotides did not effect the growth of a B cell lymphoma clone which does not produce IL-4. Blocking the binding of endogenously produced IL-4 to CH12.LX cells did not change the levels of membrane IL-4R or CD5 molecules. However, the constitutive expression of Thy-1 by these B cells was markedly decreased, and anti-Thy-1 antibodies decreased proliferation and PMA-induced aggregation of CH12.LX cells. Autocrine secretion of IL-4 thus appears to be required both for the continuous proliferation of CH12.LX B cells, as well as their expression of Thy-1, which may function either as a homotypic adhesion molecule or a signal transduction molecule for these cells. These findings indicate that endogenously produced lymphokines may play a critical role in the maintenance of B cell hyperproliferative disorders.
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PMID:Endogenous secretion of IL-4 maintains growth and Thy-1 expression of a transformed B cell clone. 809 58

The authors studied 56 cases of diffuse low-grade B-cell lymphoma using frozen tissue sections and a large panel of monoclonal antibodies that distinguish subsets of normal B cells. They compared the immunophenotypes with the histologic subtypes defined by the Rappaport classification, Working Formulation, and Kiel classification to correlate antigen expression with the morphologic subtypes defined in these classification schemes and to define the contribution of immunophenotype to clinically relevant subclassification. All categories in all classifications showed some heterogeneity of antigen expression; however, antigen expression correlated better with four major subgroups defined by the Kiel classification: (1) CD5+ CD10- CD23+ CD43+: chronic lymphocytic leukemia (CLL); (2) CD5+ CD10-/+CD23- CD43+: centrocytic (mantle cell) lymphoma; (3) CD5- CD10+/- CD23-/+ CD43-: centroblastic/centrocytic (CB/CC) lymphoma; and (4) CD5- CD10- CD23-/+CD43-/+: immunocytoma, mucosa-associated lymphoid tissue (MALT)-type, and monocytoid B-cell lymphoma. These subgroups had distinctive clinical features. Patients with centrocytic lymphoma were predominantly male (5.5:1) and had a significantly worse probability of survival than those with either CLL or MALT-type lymphoma (P = 0.001). The group with CB/CC lymphoma had an equal male-female ratio and an intermediate prognosis. Most patients with MALT-type and nodal monocytoid B-cell lymphomas were female (2:1); the disease-free survival for patients with extranodal MALT-type lymphoma was significantly better than that for all patients with other lymphoma subtypes except CB/CC (P < 0.01). The group with non-MALT immunocytoma had a slight male predominance, a high frequency of monoclonal gammopathy, and an intermediate prognosis. In differential diagnosis, CD23 was useful in distinguishing B-cell CLL from centrocytic lymphoma (P < 0.0001); CD5 (P < 0.0001), CD6 (P < 0.005), and CD43 (P < 0.0001) distinguish centrocytic lymphoma from CB/CC lymphoma; and CD10 (P < 0.005), CD43 (P = 0.06), Leu-8 (P = 0.08), and Ig heavy chain (P = 0.01) may help distinguish CB/CC lymphoma from immunocytoma, monocytoid B-cell lymphoma, and MALT-type lymphoma. Differences in antigen expression and clinical features among these Kiel classification subgroups suggest that they represent distinct biologic entities. The Working Formulation categories do not delineate these diseases clearly.
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PMID:Diffuse low-grade B-cell lymphomas. Four clinically distinct subtypes defined by a combination of morphologic and immunophenotypic features. 821 30

Biopsy specimens obtained from 2 patients with monocytoid B cell lymphoma, 7 with mantle zone lymphoma, 7 with small lymphocytic lymphoma or B chronic lymphocytic leukemia, and 6 with hairy cell leukemia were investigated using an immunohistochemical method to detect their immunophenotypic characteristics. Periodate-lysine-paraformaldehyde-fixed frozen biopsies from the lymph node, peripheral blood, bone marrow, spleen, tonsil, lung, and stomach were studied. Monocytoid B cell lymphoma exhibited the immunophenotype of surface(s) IgD-/DRC-1-/Leu-1(CD5)-/Leu-M5(CD11c)-, +/- on the neoplastic cells or neoplastic lesions, mantle zone lymphoma exhibited that of sIgD+/DRC-1++/Leu-1-,+/Leu-M5-, small lymphocytic lymphoma or B chronic lymphocytic leukemia that of Leu-1+/sIgD-,+sIgD-,+/DRC-1- > +Leu-M5-, and hairy cell leukemia that of Leu-M5++/sIgD- >> +/Leu-1- >> +/DRC-1-. We therefore suggest that these four types of lymphomas can be differentiated by a combination of anti-sIgD, DRC-1, Leu-1, and Leu-M5 monoclonal antibodies based on their immunophenotypic characteristics.
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PMID:Immunohistochemical characteristics of monocytoid B cell lymphoma, mantle zone lymphoma, small lymphocytic lymphoma (or B chronic lymphocytic leukemia), and hairy cell leukemia. 806 18

A case of cutaneous B-cell lymphoma is described. The patient was treated only by surgical excision of the skin tumors five times during a period of about two years from February of 1984 to October of 1986. After the last surgical excision, a continuous disease-free period was achieved. Biopsy samples showed dense lymphocytic infiltrations with discrete masses in the dermis and subcutis; one of them showed a storiform pattern. At the time, the infiltrating cells were composed of medium and large lymphoid cells and spindle-shaped cells. The medium and large lymphoid cells were positive for CD20, CD22 and HLA-DR and negative for CD3, CD4, CD5, CD8, CD43, and kappa and lambda light chain. The spindle-shaped cells were negative for CD20, CD43, kappa and lambda light chain, lysozyme, and S-100 protein.
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PMID:A case of cutaneous B-cell lymphoma with a storiform stromal reaction. 834 May 35

The risk of B-cell lymphoma is greatly increased in transplant patients, whereas T-cell lymphomas have only rarely been reported in these patients. Although T-cell lymphomas in nonimmunosuppressed patients may be associated with either human T-cell lymphotropic virus type I (HTLV-I) or Epstein-Barr virus (EBV), these viruses have not been reported in association with post-transplant T-cell lymphoma. We report a case of T-cell lymphoma of the vulva arising in a renal allograft recipient receiving azathioprine and prednisone. The unusual clinical presentation led to difficulty in diagnosis because of a resemblance to either an infectious process or squamous cell carcinoma. The large cell lymphoma involved the dermis and subcutaneous fat of the vulva and was associated with hemophagocytosis in lymph nodes and bone marrow. The tumor had a mature, aberrant T-cell immunophenotype (CD3+ CD4+ CD7+ CD2- CD5- CD30+). Rearrangement of the T-cell receptor beta and gamma chain genes was found, but there was no evidence of either EBV or HTLV-I genomes. This case adds to the clinical and morphologic spectrum of T-cell lymphomas reported in allograft recipients and suggests that known lymphotropic viruses do not commonly have a role in post-transplant T-cell lymphoma.
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PMID:T-cell lymphoma of the vulva in a renal allograft recipient with associated hemophagocytosis. 839 4

WEHI-231 is a murine B cell lymphoma that has been used extensively as a model for the immature stage B cell and its functional response to Ag receptor cross-linking as a model for immature B cell tolerance. This cell line expresses sIgM, CD5, and FcR gamma, but lacks the B cell-specific isoform of CD45 (B220). This study demonstrates for the first time that WEHI-231, in contrast to classically defined immature B cells, expresses delta on its surface. Analysis of delta on WEHI-231 revealed structural differences with respect to that on BAL-17 or primary splenic B cells. Although the m.w. of delta on the latter two B cell populations was similar, delta on WEHI-231 manifested a marked increase in its apparent m.w. deduced by SDS-PAGE. This difference was found to be due primarily to differential N-linked glycosylation. Signal transduction through the endogenous sIgD on WEHI-231 was investigated. In contrast to cross-linking of sIgM, cross-linking of the endogenous surface IgD on WEHI-231 was unable to generate a negative growth response in these cells. This inability may be due to uncoupling from normal surface Ig signaling pathways. The signaling properties of the endogenous sIgD on WEHI-231 differ from that on primary B cells and other sIgD-expressing cell lines. Whereas sIgD on splenic B lymphocytes or the mature B cell line BAL-17 is coupled to inositol phospholipid hydrolysis and calcium mobilization, cross-linking of sIgD on WEHI-231 failed to elicit these events, although induced changes in tyrosine phosphorylation were observed. Thus, endogenous expression of surface IgD on WEHI-231 is inconsistent with its representing the classically defined immature stage B cell. The structural and signaling differences associated with delta on these cells suggest the potential for developmentally regulated delta function and model for study of sIgD signal transduction.
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PMID:Endogenous expression of delta on the surface of WEHI-231. Characterization of its expression and signaling properties. 840 28

We studied the morphologic, immunologic and clinical features of 14 cases of primary non-lymphoblastic non-Hodgkin's lymphomas of the mediastinum. The patients ranged in age from 3 to 76 years, with a median age of 28 years. According to the Ann Arbor classification, 71% of our cases were in an early stage. Three cases were in Stage I, eight in Stage II, one in Stage III and two in Stage IV (one with multiple hepatic lesions and another with bone marrow involvement). The patients were heterogeneous in terms of the disease and were therefore histologically classified into three categories: diffuse large B cell lymphoma with sclerosis (DLS; n = 8); large cell anaplastic lymphoma (LC-Ana; n = 5); and low grade B cell lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma; n = 1). DLS was the most common group and was characterized as CD5-, CD10-, CD19+, CD20+, CD21- and CD22+. Imprint smears showed azurophilic granules in the cytoplasm of the tumor cells of three of four DLS cases. All of the six cases examined were negative when tested for Epstein-Barr virus (EBV) sequences after hybridization with the EBV internal repeat probe. DLS and MALT lymphoma cases were of a B-lineage lymphoma of the thymus, while most of the LC-Ana cases were of a T-lineage lymphoma. Patients with non-lymphoblastic non-Hodgkin's lymphomas had a relatively favorable prognosis compared with lymphoblastic lymphoma (P < 0.01 by the generalized Wilcoxon test). There was no significant difference in the survival between non-lymphoblastic non-Hodgkin's lymphoma and Hodgkin's disease (P > 0.05 by the generalized Wilcoxon test).
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PMID:Clinicopathologic study of primary mediastinal non-lymphoblastic non-Hodgkin's lymphomas among the Japanese. 846 56


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