Mixed epithelial/mesenchymal metaplastic carcinoma (carcinosarcoma) of the breast in BRCA1 carrier.
This case report describes a 35-year-old woman who was diagnosed with mixed epithelial/mesenchymal metaplastic carcinoma (carcinosarcoma) of the breast. Genetic analysis of blood DNA revealed a common founder mutation, BRCA1 5382insC. Examination of microdissected tumor samples determined that both epithelial and mesenchymal components contained deletion of the wild-type BRCA1 allele. This report exemplifies that even very uncommon breast tumor types may develop through biallelic inactivation of BRCA1 gene, that has to be considered in the genetic testing settings.
Laboratory of Molecular Oncology, N.N. Petrov Institute of Oncology, Pesochny-2, St. Petersburg, Russia.
Evgeny N
EN
Suspitsin
Anna P
AP
Sokolenko
Dmitry A
DA
Voskresenskiy
Alexandr O
AO
Ivantsov
Kseniya V
KV
Shelehova
Valery F
VF
Klimashevskiy
Dmitry E
DE
Matsko
Vladimir F
VF
Semiglazov
Evgeny N
EN
Imyanitov
D000328:Adult; D001943:Breast Neoplasms / Q000235:genetics* / Q000473:pathology; D002296:Carcinosarcoma / Q000235:genetics* / Q000473:pathology; D005260:Female; D019398:Genes, BRCA1; D005820:Genetic Testing; D006801:Humans