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- W2065594698 abstract "Methotrexate (MTX)-associated B-cell lymphoproliferative disorders (B-LPD) may first present in the skin, but their clinicopathologic features are still ill defined. Differentiation from primary cutaneous follicle center lymphoma and primary cutaneous diffuse large B-cell lymphoma, leg type (PCLBCL-LT) is important, as MTX-associated B-LPD may show spontaneous regression after withdrawal of MTX therapy. In the present study, the clinicopathologic and phenotypical features of 10 patients with MTX-associated B-LPD first presenting in the skin, including 5 EBV+ and 5 EBV− cases, were investigated. Six patients had skin-limited disease. Clinically, abrogation of MTX therapy resulted in a complete response in 4 cases and a partial response in another 2. The 5-year disease-specific survival was 90%. MTX-associated B-LPD differed from primary cutaneous follicle center lymphoma by the presence of ulcerating and/or generalized skin lesions, an infiltrate composed of centroblasts/immunoblasts rather than large centrocytes, reduced staining for CD79a, and expression of BCL2, IRF4, and FOXP1 in most cases. EBV+ MTX-associated B-LPD differed from PCLBCL-LT by the presence ulcerative skin lesions, marked tumor cell polymorphism, reduced staining for CD79a, and expression of CD30 and EBV. EBV− cases showed morphologic and immunophenotypical similarities to PCLBCL-LT but differed by presentation with generalized skin lesions in 4 of 5 cases. The results of this study, showing a relatively good clinical outcome and spontaneous disease regression after only withdrawal of MTX in a considerable proportion of patients, underscores the importance of a careful wait-and-see policy before considering more aggressive therapies in patients with MTX-associated B-LPD of the skin." @default.
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- W2065594698 date "2014-07-01" @default.
- W2065594698 modified "2023-10-16" @default.
- W2065594698 title "Methotrexate-associated B-cell Lymphoproliferative Disorders Presenting in the Skin" @default.
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- W2065594698 doi "https://doi.org/10.1097/pas.0000000000000225" @default.
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