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Trichoblastic carcinosarcoma in a 34‐year‐old woman with histopathologic and molecular analysis, including re‐demonstration of a CDKN2A p.( R58 *) mutation
Author(s) -
Kim Chris,
Brown Angela,
Osipov Vladimir
Publication year - 2021
Publication title -
journal of cutaneous pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.597
H-Index - 75
eISSN - 1600-0560
pISSN - 0303-6987
DOI - 10.1111/cup.13892
Subject(s) - carcinosarcoma , cdkn2a , malignancy , pathology , cancer , biology , medicine , carcinoma , genetics
Trichoblastic carcinosarcomas are rare, adnexal‐type cutaneous carcinosarcomas that are thought to be related histogenetically to trichoblastomas, yet in which both the epithelial and stromal components show features of malignancy. Ten cases have been described in the literature thus far, with a predilection for the head and neck of older males. We present a case of cutaneous carcinosarcoma in sun‐damaged skin of a 34‐year‐old woman showing features of a trichoblastic carcinosarcoma, with histopathologic analysis along with targeted next‐generation sequencing of 50 cancer‐associated genes. Two pathogenic variants in TP53 were identified, p.(R158C), p.(R273P), along with a likely pathogenic variant CDKN2A, p.(R58*). In particular, it is noted that the CDKN2A p.(R58*) missense mutation has been described in two previous cases of cutaneous carcinosarcomas, including a case of trichoblastic carcinosarcoma.