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- W4313483062 abstract "Primary cutaneous marginal zone lymphoproliferative disorder (PCMZL) and primary cutaneous CD4 + small/medium T-cell lymphoproliferative disorder (CD4 + TLPD) are indolent lymphoproliferative disorders. However, cases with overlapping features can be challenging. We identified 56 CD4 + TLPD and 38 PCMZL cases from our pathology archives. Clinical, morphologic, and immunophenotypic features were reviewed. Polymerase chain reaction for immunoglobulin (IG) and T-cell receptor gamma (TRG) gene rearrangements were analyzed. Next-generation sequencing studies were performed on 26 cases with adequate material, 19 with CD4 + TLPD, and 7 with PCMZL. CD4 + TLPD presented mostly (91%) as solitary lesions, located in the head and neck area (64%), while PCMZL occurred mostly in the upper extremity (47%) and trunk (34%). Lesions were sometimes multiple (40%) and recurrences (67%) were more common. Cases of PCMZL had an increase in reactive CD3 + T cells, with frequent programmed cell death protein 1 expression, whereas cases of CD4 + TLPD often contained abundant reactive B cells. Twenty-five cases were identified as having overlapping features: 6 cases of PCMZL were clonal for both IG and TRG; 11 cases of CD4 + TLPD were clonal for IG and TRG and 6 cases of CD4 + TLPD had light chain–restricted plasma cells. By next-generation sequencing, 23 variants were detected in 15 genes, with PCMZL more likely to show alterations, most commonly affecting TNFAIP3 and FAS, altered in 5 cases. Both entities have an indolent clinical course with response to conservative therapy and management, and warrant interpretation as a lymphoproliferative disorder rather than overt lymphoma." @default.
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- W4313483062 date "2022-10-21" @default.
- W4313483062 modified "2023-10-14" @default.
- W4313483062 title "Overlapping Features of Primary Cutaneous Marginal Zone Lymphoproliferative Disorder and Primary Cutaneous CD4+ Small/Medium T-Cell Lymphoproliferative Disorder" @default.
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- W4313483062 doi "https://doi.org/10.1097/pas.0000000000001984" @default.
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