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Query: UNIPROT:Q06643 (non-Hodgkin's lymphoma)
 11,307 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

We report two cases of regressing cutaneous lymphoma. The first case is a CD30-positive T-cell lymphoma with immunogenetic evidence of clonality. The second case is a diffuse large-cell non-Hodgkin's lymphoma of B-cell lineage in which clonality was established by immunogenetic analysis and in situ hybridization for light-chain mRNA.
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PMID:Regressing cutaneous lymphomas of T-cell and B-cell lineage. 777 92

Although T-cell-rich B-cell lymphoma (TCRBCL) is a recently recognized form of non-Hodgkin's lymphoma (NHL), limited information regarding its incidence, cellular origin, morphologic spectrum, and biologic behavior is currently available. In this study, the clinicopathologic features of eight patients with TCRBCL are presented. This neoplasm comprised about 1% of all NHLs seen at Emory University Hospital over 2 years. The male-to-female ratio was 1.6, and the mean age at diagnosis was 60 years. At presentation, TCRBCL was nodal in 88% of the patients and widely disseminated in 50% of the patients. A complete remission was seen in three of the five patients treated with combination chemotherapy that was directed at intermediate grade NHL. Three patients received inadequate or incomplete chemotherapy. One of these patients later achieved a complete remission with more intensive therapy. Two of the patients were not evaluable for response to therapy. The actuarial and disease-free survival rates of the group at 5 years were 72% and 21%, respectively. Morphologically, the lymph nodes in seven of eight cases were diffusely obliterated, whereas one had markedly expanded interfollicular zones that lead to an initial diagnosis of T-zone lymphoma. All tumors were characterized by no more than 25% large lymphoid cells, which were scattered in a background of small lymphocytes with round or irregular nuclei. The presence of numerous histiocytes imparted a lymphoepithelioid appearance in two cases. Although immunoperoxidase stains of frozen tissue were initially suggestive of a peripheral T-cell lymphoma in some cases, paraffin immunoperoxidase stains clearly established the B-cell nature of the large cells, whereas most of the small cells were T lymphocytes. The clonal nature of the large cells was confirmed in seven cases by monotypic immunoglobulin (Ig) light chain restriction or Ig gene rearrangements. Epstein-Barr virus genomic DNA was detected in two of the six cases tested by polymerase chain reaction or Southern blot analysis, but no evidence of a bcl-2 rearrangement was found in any of the five cases examined. These findings indicate that TCRBCL is an uncommon form of NHL with a therapeutic response and overall survival consistent with intermediate grade lymphoma. Paraffin immunoperoxidase stains and occasionally genotypic analysis are required to exclude the diagnosis of PTCL or diffuse lymphocyte predominant Hodgkin's disease. The authors found no morphologic or molecular evidence to support a follicular center cell origin in these cases of TCRBCL.
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PMID:T-cell-rich B-cell lymphoma. A clinicopathologic study of eight cases. 781 42

The clinicopathologic features of 23 patients with hematophagic histiocytosis (HH) are described. All of them exhibited increased histiocytes associated with hemophagocytosis in the marrow. The patients usually presented with fever, hepatosplenomegaly, lymphadenopathy, and cytopenia. The underlying illnesses were heterogeneous, including non-Hodgkin's lymphoma in 17, systemic lupus erythematosus in one, diabetes mellitus in one, acute myelomonocytic leukemia in one, myelodysplastic syndrome in one, and unknown cause in two. Among 17 non-Hodgkin's lymphoma, 14 were peripheral T-cell lymphoma, two were B-cell lymphoma, and one was an undefined phenotype. Among 14 patients with peripheral T-cell lymphoma, six of the patients had nasal T-cell lymphoma. Five of these 14 patients initially diagnosed as malignant histiocytosis turned out to be T-lineage lymphoma after immunophenotypic studies. Active infections, most of viral origin, were documented in eight patients, including Epstein-Barr virus in three, cytomegalovirus in three, herpes simplex virus in three, Pseudomonas aeruginosa in one, Bacteroides vulgatus in one, and mycoplasma in one. Some of them had mixed virus and bacteria infection. Sixteen (70%) of our patients died of their acute illness within 10 weeks of the diagnosis of HH. In the past, the clinical and histologic differentiation between hematophagic histiocytosis and true histiocytic neoplasm (histiocytic medullary reticulosis/malignant histiocytosis) has proved difficult, but now these can be distinguished with immunohistologic, immunogenetic, and cytogenetic studies, especially in the cases of peripheral T-cell lymphoma with hemophagocytic syndrome.
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PMID:Hematophagic histiocytosis: a clinicopathologic analysis of 23 cases with special reference to the association with peripheral T-cell lymphoma. 792 83

Thirty-one cases of primary non-Hodgkin's lymphoma of the intestine were investigated. Twenty-one were of B-cell and 10 of T-cell origin. The B-cell lymphomas comprised two cases of low-grade B-cell lymphoma of mucosa-associated lymphoid tissue (MALT), one of centroblastic/centrocytic type, three of high-grade B-cell lymphoma coexisting with a low-grade B-cell lymphoma of MALT, nine of centroblastic, three of immunoblastic and three of Burkitt type. Of the T-cell lymphomas, eight were of pleomorphic medium-to large-sized cell type and two of large cell anaplastic type. All the B-cell lymphomas expressed CD20 (L26) and/or Ki-B5; in six there was monotypic immunoglobulin light chain restriction. Membrane positivity for CD45RO (UCHL1) was observed in the 10 cases of T-cell lymphoma, but the tumour cells did not express monocyte-macrophage markers. Clinically, the patients with T-cell lymphomas were usually young males with constitutional symptoms and their prognosis was significantly worse than those of patients with intestinal B-cell lymphoma.
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PMID:Primary non-Hodgkin's lymphoma of the intestine: a morphological, immunohistochemical and clinical study of 31 Chinese cases. 798 73

Proliferative activity in 106 cases of non-Hodgkin's lymphoma was estimated using the monoclonal antibody Ki67 and by counting the number of mitotic figures. The percentage of Ki67-positive cells was compared with the median number of mitotic figures per square millimeter. Both Ki67 positivity and the number of mitotic figures were found to be greater in high grade than in low grade lymphomas, although there was an overlap between the two grades of malignancy. A close correlation was found between the number of mitotic figures and the percentage of Ki67-positive cells not only in all lymphoma types taken together (rs = 0.834, P < 0.001), but also in B-cell lymphoma (rs = 0.818, P < 0.001) and T-cell lymphoma (rs = 0.764, P < 0.001) taken separately. Thus, both methods are useful for the estimation of proliferative activity, but each method has its advantages and disadvantages.
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PMID:Correlation between the number of mitotic figures and the percentage of Ki67-positive cells in non-Hodgkin's lymphomas. 808 28

Primary central nervous system (CNS) involvement of non-Hodgkin's lymphoma is uncommon and a vast majority of reported cases are of B-cell origin. We present a 52-year-old woman with primary peripheral T-cell lymphoma of the brain. Immunostaining of paraffin-embedded sections proved tumor cells to be positive for T-cell markers MT1 and UCHL1, and negative for B-cell markers MB1, and 4KB5. Radiotherapy combined with steroid therapy rendered neurologic recovery and complete tumor remission confirmed by computed tomography and magnetic resonance imaging. From a review of documented 19 cases of primary CNS T-cell lymphoma including the present case, this disease is characterized by poor prognosis among CNS lymphomas.
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PMID:Primary central nervous system involvement of the so called 'peripheral T-cell lymphoma'. Report of a case and review of the literature. 805 38

To determine whether correlations existed between morphologic and immunophenotypic findings and clinical characteristics, 30 cases of T-cell-rich large B-cell lymphomas (TBL) were evaluated by histopathology, immunostaining, and polymerase chain reaction on paraffin-embedded material. All were characterized by a polymorphic cell composition, including a variable mixture of small and large lymphoid cells and reactive cell. Most cases (87%) fitted into one of three main histologic types of non-Hodgkin's lymphoma (diffuse, mixed cell; diffuse, large cell; follicular and diffuse, mixed cell), and one group of eight cases had the prototypic features described by Ramsay et al. (17). All cases showed a component of large CD20(L26)+ MB2+ B cells in a predominant back-ground of reactive T cells (> 50% of the total lymphoid forms). Clonality was demonstrated by light chain restriction in 67% of cases and by rearrangement of the immunoglobulin heavy chain gene and bcl-2 gene in 64% and 28% of cases, respectively. The patients were predominantly men (70%), ages 18-83 years (median of 62.5), and were initially seen predominantly with nodal disease (and extranodal involvement in 20%) at advanced stages (III-IV: 77%). Treatment was mostly aggressive chemotherapy, and the outcomes were favorable (84% alive and well). These features are not distinctive as compared with those of typical large-cell lymphoma, nor did subgroups within the series (prototypic cases versus others; cases with less [< or = 70%] or more [> 70%] T-cell infiltration) significantly differ in clinical presentation or outcome. Thus, this study confirms that TBL, while useful as a diagnostic variant to be distinguished from both peripheral T-cell lymphoma and Hodgkin's disease, is a heterogeneous assortment of diverse histopathologic categories rather than a clinicopathologic entity. The term "T-cell rich" might, however, be usefully retained as a morphologic specification to be added to recognized histologic categories of lymphoma.
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PMID:T-cell-rich large B-cell lymphoma. A study of 30 cases, supporting its histologic heterogeneity and lack of clinical distinctiveness. 779 83

All cases of gastrointestinal (GI) non-Hodgkin's lymphoma diagnosed in Finland between 1972 and 1977 were histologically reexamined and immunostained in order to study the value of histological classification. One hundred and eleven cases were found. The crude annual incidence was 0.51/10(5) and the age-adjusted (world standard population) incidence 0.23/10(5). The male-to-female ratio of age-adjusted incidence rates was 2.7. The most common histological type was large B-cell lymphoma comprising 61% of all classifiable cases. Low-grade mucosa-associated lymphoid tissue (MALT) lymphoma comprised 12%, centrocytic lymphoma 9%, peripheral T-cell lymphoma 9%, Burkitt's lymphoma 7% and large-cell anaplastic lymphoma 3% of the total. In the jejunum, almost one half of the cases were T-cell lymphomas and there were no lymphomas with definite MALT features. Gastric lymphomas had higher survival rates than intestinal lymphomas, B-cell lymphomas slightly higher survival rates than T-cell lymphomas, and low-grade MALT lymphomas higher survival rates than other B-cell lymphomas. The other types of lymphomas differed only slightly from each other in prognosis. The histological grade according to the Working Formulation correlated with survival rates, but a great majority of cases were classified as intermediate grade. Classification of GI lymphomas into the types mentioned above appears to correlate with several clinical and pathological parameters.
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PMID:Gastrointestinal non-Hodgkin's lymphoma. A population-based clinicopathological study of 111 adult cases with a follow-up of 10-15 years. 821 15

A study was conducted in four regions of China (Suzhou, Nanjing, Qingdao and Shenyang) during the period of 18 months from Dec. 1984 to June 1986, trying to find out the characteristic features of histo- and immuno-pathology of malignant lymphomas in China and relationship with HTLV-1. Fresh specimens were collected from 209 lymphoma patients who were all newly diagnosed. There were 25 cases of Hodgkin's disease (12%), and the other 184 cases of non-Hodgkin's lymphoma (88%). These 184 cases were classified according to the Working Formulation proposed by the National Cancer Institute of USA. It was found that low grade group was 5.4% and intermediate and high grade were 48.9% and 38.0%, respectively. Follicular lymphoma was 4.3% and lymphoma of small lymphocytic type was 2.7%. Fourteen cases (7.6%) were pleomorphic type mimicking adult T-cell lymphoma reported by Japanese. Immunotyping was carried out in 162 cases of non-Hodgkin's lymphoma. The tumors with T-cell markers were 33.9%, B-cell markers 62.4%, and non-T, non-B markers 3.7%. The frequency of T-cell lymphoma cases varied from area to area. Suzhou was 45.8%, Nanjing 57.9%, Qingdao 44.4% and shenyang 11.3%. In the group studied there were only 3 cases showed HTLV-1 positive in serum with pleomorphic morphology and T-cell markers. Our findings indicate that composition of histopathologic types of malignant lymphoma in China is different from that in western countries, and the incidence of T-cell lymphoma is high in certain areas of the lower reaches of the Yangzi River.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[A histopathologic and immunopathologic study of 209 malignant lymphoma cases from four regions of China: Suzhou, Nanjing, Qingdao and Shenyang]. 822 31

We describe a series of eight cases of T-cell-rich B-cell lymphoma diagnosed on liver biopsy and collected over a period of 15 years. Of seven cases that were referred from elsewhere, in only one was the correct diagnosis of B-cell lymphoma suggested. Common errors included misdiagnosis as inflammatory disease on histology, and misinterpretation as T-cell lymphoma on immunohistochemistry. However, the cases had a distinct morphological appearance and immunohistochemical profile. They showed a lymphohistiocytic or granulomatous infiltrate, usually centred on portal tracts and containing abundant small T-cells and scanty B-cell blasts. All patients had an atypical clinical presentation which favoured non-neoplastic liver disease. In seven cases liver involvement represented Stage IV disease and in one case disease was confined to the liver consistent with a primary hepatic lymphoma. Despite combination chemotherapy, the prognosis was poor with no patients surviving beyond 15 months from diagnosis. We believe T-cell-rich B-cell lymphoma to be an under-recognized subset of non-Hodgkin's lymphoma that may mimic primary liver disease.
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PMID:T-cell-rich B-cell lymphoma presenting as liver disease. 822 39


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