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

Various samples from lymphoproliferative diseases in the skin were analyzed by Southern blotting technique with probes from the T cell receptor gene, immunoglobulin genes, and human T cell leukemia virus-I genome. Samples were taken from 10 mycosis fungoides (MF) patients, 1 parapsoriasis en plaque patient, 10 Adult T cell leukemia/lymphoma (ATL) patients, 1 cutaneous T cell lymphoma (CTCL) patient, 4 lymphomatoid papulosis (LP) patients, 4 B cell lymphoma patients, and 2 actinic reticuloid (AR) patients. In MF, the monoclonality of the T cells became detectable first in the skin when plaques develop to tumors then in lymph nodes, and finally in the blood lymphocytes, indicating this disease develops from local (skin) malignancy to systemic malignancy. In parapsoriasis en plaque, no monoclonality was detected in any sample. We could distinguish cutaneous ATL from the carrier state by detecting the T cell monoclonality and HTLV-I integration with these probes. One patient with CTCL showed detectable T cell monoclonality; 1 out of 4 patients with LP did the same. Four samples from patients with B cell lymphoma revealed detectable monoclonal rearrangement of immunoglobulin heavy and light chain genes. In AR, no monoclonality was detected in any sample. From these data, we conclude that DNA analysis is useful in determining the monoclonality, cell origin, and distribution of monoclonal cells from skin samples.
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PMID:Characterization of the lymphoproliferative diseases in the skin by DNA analysis. 180 May 28

In normal human epidermis HLA-DR-antigen is only present on Langerhans' cells and the acrosyringeal epithelium. We investigated the distribution of HLA-DR-antigen in 78 specimens of various skin diseases by an immunoperoxidase method using a monoclonal anti-HLA-DR antibody. HLA-DR-antigen bearing keratinocytes were not only found in lichen planus and mycosis fungoides, as it has been referred previously, but were also observed in some cases of cutaneous B-cell lymphoma, pseudolymphoma, lupus erythematosus, parapsoriasis en plaque, bullous pemphigoid, drug reaction, contact dermatitis, actinic keratosis and verrucous carcinoma. Direct contact of lymphoid cells with keratinocytes was not necessary for Ia-antigen expression.
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PMID:HLA-DR-antigen bearing keratinocytes in various dermatologic disorders. 257 18

A 59-year-old female, clinically diagnosed as having parapsoriasis en plaque for ten years, was referred on June 1991 to the Department of Oral Surgery in the Dental School of showa University with a complaint of painless swelling of the left malar area. The swelling was found to have been caused by a tumor. Since the excised tumor was suspected to be a malignant lymphoma, she was admitted to our hospital. The specimen was subsequently confirmed to be a malignant lymphoma of the diffuse large cell type according to the LSG classification, and was immunologically confirmed to be a B cell lymphoma. In addition, the excised skin was suspected of incipient mycosis fungoides. She was classified as having stage IE disease according to her bone marrow biopsy and other examinations. she was treated with combination of chemotherapy (CHOP) and radiation therapy. This subject was interesting because her tumor probably resulted from a parapsoriasis en plaque skin lesion.
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PMID:[Parapsoriasis en plaque suspected of progression to mycosis fungoides associated with extranodal malignant B cell lymphoma of the cheek]. 836 74

Human herpesvirus 8 (HHV-8) is a new virus which has been reported in Kaposi's sarcoma and some lymphoproliferative disorders such as Castleman's disease and body-cavity-based lymphoma. Because HHV-8 shares homology with Epstein-Barr virus (EBV), we searched for the presence of HHV-8 DNA sequences in various cutaneous T- and B-cell lymphoma by the polymerase chain reaction (PCR). Forty-seven HIV-negative patients with cutaneous lymphoma or large plaque parapsoriasis were enrolled in the study. For the detection of HHV-8 DNA sequences we used PCR followed by a hybridization with a digoxigenin-labelled probe and nested-PCR. HHV-8 DNA sequences could only be detected in a patient with large plaque parapsoriasis. Our study does not suggest any direct implication of HHV-8 in the pathogenesis of most cutaneous lymphoma. Serological studies will be helpful to appreciate if there is an epidemiological link between HHV-8 and cutaneous lymphomas.
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PMID:Lack of evidence of human herpesvirus 8 DNA sequences in HIV-negative patients with various lymphoproliferative disorders of the skin. 921 12

The diagnosis of early cutaneous T-cell lymphoma (CTCL) is a difficult point in dermatology. Recently, Southern blot analysis (SBA) and polymerase chain reaction (PCR) have been used to detect clonality in initial lesions in which clinical and histological findings are unspecific. Forty-one samples from 25 patients with CTCL were investigated for the presence of T-cell receptor-gamma gene rearrangement using a nested PCR technique and analysed by polyacrylamide gel electrophoresis (PAGE). Conventional SBA was also performed on 28 samples from 20 of these patients. In addition, 20 samples corresponding to patients with large plaque parapsoriasis (LPP), cutaneous B-cell lymphoma (CBCL) and eczema were analysed by PCR in the same way as were the CTCL specimens. Most of the CTCL specimens (81%) showed clonality on PCR analysis. Among patients with mycosis fungoides, 71% of initial patch lesions and 100% of plaques and tumours showed clonal disease. Clonality could be detected in three of four histologically negative post-treatment lesions. Clonal rearrangement was detected in one of three patients with LPP and in three of 10 patients with CBCL. None of the samples corresponding to patients with eczema showed positive results. SBA was significantly less sensitive than PCR in detecting clonality in CTCL patients (42% among early disease and 60% among advanced cases). The results indicate that this PCR/PAGE technique is a reliable and useful method for the detection of clonality in early skin lesions of CTCL patients and probably in the identification of silent extracutaneous involvement.
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PMID:Genotypic analysis of cutaneous T-cell lymphoma: a comparative study of Southern blot analysis with polymerase chain reaction amplification of the T-cell receptor-gamma gene. 1023 47