Immunophenotypic switch in cutaneous T‐cell lymphoma: A series of three cases and review of the literature. (26th April 2021)

• Record Type: Journal Article
• Authors: Bitar, Carole; Hile, Grace; Brown, Noah A.; Fullen, Douglas R.; Lowe, Lori; Tejasvi, Trilokraj; Wilcox, Ryan A.; Harms, Paul W.; Chan, May P.; Bresler, Scott C.; Hristov, Alexandra C.
• Is Part Of: Journal of cutaneous pathology. Volume 48:Number 7(2021)
• Page Start: 986
• Page End: 994
• Publication Date: 2021-04-26
• Subjects: cutaneous T‐cell lymphoma -- immunohistochemistry -- immunophenotype -- immunophenotypic switch -- T‐cell receptor gene rearrangement; Skin -- Diseases -- Periodicals; Dermatology -- Periodicals; 616
• DOI: 10.1111/cup.14026
• Languages: English
• ISSNs: 0303-6987

Abstract

Abstract: Primary cutaneous T‐cell lymphoma (CTCL) comprises a heterogeneous group of neoplasms with variable clinical behavior. Immunophenotypic switch (IS) is a phenomenon that occurs during lymphoma progression and is defined by an alteration in the immunophenotypic expression of a tumor with retention of its genotypic signature. This has been well‐recognized in hematopoietic neoplasms; however, it has been rarely reported in CTCL and its clinical implications are not well understood. We present the clinical, histopathologic, immunophenotypic, and genetic findings of three cases of CTCL that demonstrated IS post treatment with variable outcomes. We add our cases to the small number previously reported to increase awareness of this phenomenon and its diagnostic challenge.