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)

Lymphocyte depleted classical Hodgkin lymphoma (LDHL) is a vanishing category of classical Hodgkin lymphoma (CHL); many cases previously placed in this category are now recognised as diffuse large B-cell lymphoma (DLBCL), anaplastic large-cell lymphoma (ALCL), or nodular sclerosis CHL with lymphocyte depletion. In addition, the recent recognition of high grade B-cell lymphomas intermediate between DLBCL and CHL (grey-zone lymphomas) raises the question of whether LDHL exists at all as a category of CHL. We studied eight cases that fulfilled diagnostic criteria of LDHL according to the 2008 WHO Classification. The cases involved lymph nodes (7 cases) and pleura (1 case) from four males and four females (age 30-71 years; median 62 years). All tumors contained numerous Hodgkin-Reed-Sternberg (HRS) cells, fibroblasts and histiocytes and scattered lymphocytes. In three cases the tumors had a more diffuse fibrotic appearance, while in five cases they appeared reticular and anaplastic. Neoplastic cells in all cases expressed CD30, CD15, fascin, weak PAX5 and MUM-1 and lacked CD45, Alk-1, EMA, CD3, CD68, Mart-1 and cytokeratin. Oct.2 and/or Bob-1 were expressed in all cases. Two cases variably expressed CD20 but were CD79a negative. Four cases were positive for EBV. All the four cases with adequate DNA had clonally rearranged IGH genes. The combined morphologic, immunophenotypic and molecular genetic features of this group of cases distinguish LDHL from other disease entities, including grey-zone lymphomas.
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PMID:Lymphocyte depleted Hodgkin lymphoma: an evaluation with immunophenotyping and genetic analysis. 1945 61

Histiocytic necrotizing lymphadenitis (HNL), also known as Kikuchi-Fujimoto disease, is a benign and self-limiting disease. It is histologically characterized by nodal lesions that show the infiltration of histiocytes, lymphoid cells, myeloid dendritic cells (mDCs), and plasmacytoid dendritic cells (pDCs), along with either apoptotic or karyorrhexic nuclear debris. pDCs have been proposed to be lymphoid early-committed immature DCs which are positive for CD123, CD303, CD68, and HLA-DR but negative for fascin, a mature DC marker, as well as CD13 and CD33,which are mDC markers. In the present study, we analyzed the cytomorphologic features and frequency of pDCs in the lymph nodes of HNL patients. Because the cytologic apprearance of pDCs with Papanicolau staining was quite similar to that of large lymphocytes, immunocytochemistry against CD123 was necessary for the distinction of pDCs. Counting the number of CD123-positive pDCs in the HNL lymph nodes revealed that pDCs more frequently infiltrated the lymph nodes in the setting of HNL than in either reactive lymphadenitis or T and B cell lymphoma. In addition, interestingly, the numberof pDCs did not depend on the age of the HNL lesion, thus suggesting that pDCs are excellent indicators for the cytologic diagnosis of HNL.
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PMID:Cytologic features and frequency of plasmacytoid dendritic cells in the lymph nodes of patients with histiocytic necrotizing lymphadenitis (Kikuchi-Fujimoto disease). 1994 66

Among lymphoproliferative disorders, lymph node infarction appears to be most frequently seen in diffuse large B-cell lymphoma, followed by follicular lymphoma, with other types being rare. We experienced one such case, classical Hodgkin's lymphoma (cHL) associated with lymph node infarction, in which Reed-Sternberg (RS) cells were positive for CD15, CD30, fascin, PAX-5, p53, latent membrane protein-1 (LMP-1), Bcl-2, and EBV-encoded small non-polyadenylated RNAs. Furthermore, RS cells in the infarcted area were still positive for CD30, fascin, p53, and Bcl-2. For definitive diagnosis of nodal lymphomas including Hodgkin's lymphoma, identification of the effacement of normal nodal architecture is essential. Although this could not be evaluated in our case because of predominant reactive follicular hyperplasia with interfollicular distribution of RS cells, the presence of large cells with RS cell-related molecules together with the distorted distribution of cCD3-positive cells and CD20-positive cells led us to make a definitive diagnosis of cHL. It is, therefore, considered that immunohistochemical evaluation of the infarcted lymph node is, at least on some occasions, still informative for more accurate diagnosis of lymphoid neoplasia. Hodgkin's lymphoma should also be considered when one encounters lymph node infarction.
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PMID:Lymph node infarction in classical Hodgkin's lymphoma. 2270 29

Aldehyde dehydrogenase (ALDH) 1 is expressed in various stem/progenitor cells, including cancer-initiating cells (CICs). In the present study, ALDH1 expression was immunohistochemically examined in diffuse large B-cell lymphoma (DLBCL). Unexpectedly, ALDH1 expression was occasionally detected in stromal cells, but not in lymphoma cells. Positively stained cells were CD68(+) cells with voluminous cytoplasm and fascin(+) cells with reticular morphology, designated as macrophages and dendritic cells (DCs), respectively. The presence of ALDH1(+) macrophages was not correlated with stage, response to therapies and prognosis. However, cases with ALDH1(+) DCs were mostly nodal, which showed a poorer response to therapies and a worse overall survival rate than cases without ALDH1(+) DCs. The presence of ALDH1(+) DCs appears to be involved in the malignant potential of DLBCL in lymph node.
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PMID:Significance of aldehyde dehydrogenase 1 expression in stromal cells of diffuse large B-cell lymphoma. 2297 45

A small proportion of patients with chronic lymphocytic leukemia (CLL) may progress to large cell lymphoma, or Richter syndrome (RS). The large cells of RS may arise through transformation of the original CLL clone (clonally related) or represent a new neoplasm (clonally unrelated), which might be Epstein-Barr virus (EBV)-associated. We present a 61-year-old male with 5-year history of CLL who developed RS on bilateral adrenal glands. The tumor showed a vague nodular growth pattern separated by thick fibrous bands and the tumor cells were large and pleomorphic, with focal sheet-like growth pattern, in a background of small B and T-lymphocytes. The large tumor cells were positive for CD15, CD19, CD20 (intensely and diffusely), CD30, fascin, PAX5, MUM1, OCT2, and LMP-1 by immunohistochemical stains, and EBV by in situ hybridization. The tumor was diagnosed as EBV-positive diffuse large B cell lymphoma (DLBCL), with overlapping features of classic Hodgkin lymphoma (CHL). The patient received salvage chemotherapy and was free of disease 2 years after adrenalectomy. We speculated that our case was a clonally unrelated tumor with his underlying CLL and discussed the differential diagnoses between EBV-positive DLBCL and CHL in the setting of RS.
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PMID:Epstein-Barr virus-positive diffuse large B cell lymphoma arising from a chronic lymphocytic leukemia: Overlapping features with classical Hodgkin lymphoma. 2717 Feb 10

The anaplastic variant of diffuse large B-cell lymphoma (A-DLBCL) is morphologically defined but remains an enigmatic disease in its clinicopathologic distinctiveness. Here, we report two cases involving Japanese women aged 59 years, both with A-DLBCL with the hallmark cell appearance and both indistinguishable from common and giant cell-rich patterns, respectively, of anaplastic lymphoma kinase (ALK)-positive anaplastic large cell lymphoma. Case 1 was immunohistochemically positive for CD20, CD79a and OCT-2 but not for the other pan-B-cell markers, CD30 and ALK. Case 2 showed CD20 and CD30 positivity for 50% and 20% of tumor cells in addition to strong expression of p53 and MYC. Both were positive for fascin without Epstein-Barr virus association. Our cases provide additional support for the earlier reports that A-DLBCL exhibits clinicopathologic features distinct from ordinal diffuse large B-cell lymphoma (DLBCL), and documented its broader morphologic diversity than previously recognized. They also shed light on the unique feature of absent expression of pan-B-cell markers except for CD20 and CD79a, suggesting that A-DLBCL may biologically mimic a gray zone or intermediate lymphoma between DLBCL and classic Hodgkin lymphoma.
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PMID:Anaplastic variant of diffuse large B-cell lymphoma with hallmark cell appearance: Two cases highlighting a broad diversity in the diagnostics. 2947 76

Fascin is an actin-bundling protein that is critical for filopodial formation and other cellular cytoskeletal structures. An elevated expression of fascin has been observed in tumor cells and is correlated with a shorter survival of cancer patients. Given its roles in tumor cell migration and invasion, we have developed small-molecule fascin inhibitors to prevent and delay tumor metastasis. Here we report the characterization of a new fascin inhibitor in mice. In addition to its inhibitory effects on tumor metastasis, we also report that fascin inhibitors can decrease the growth of specific subtypes of cancers, including epidermal growth factor receptor (EGFR)-high triple-negative breast cancer, and activated B-cell subtypes of diffuse large B-cell lymphoma. Hence, fascin inhibitors can be used to not only inhibit tumor metastasis, but also decrease the tumor growth of specific cancer types.
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PMID:Anti-Metastasis Fascin Inhibitors Decrease the Growth of Specific Subtypes of Cancers. 3282 26