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- Title
A novel EWSR1-MYB fusion in an aggressive advanced breast adenoid cystic carcinoma with mixed classical and solid-basaloid components.
- Authors
Lei, Ting; Shi, Yongqiang; Da, Wenyue; Xia, Cunyan; Wang, Hui
- Abstract
Breast adenoid cystic carcinoma (AdCC) with a solid-basaloid component is rare. The solid-basaloid component is usually characterized by solid nests composed of basal-like cells with marked nuclear atypia, high mitotic activity, and necrosis. Given the rarity of such tumors, information on their clinicopathological and genomic characteristics is limited. Herein, we report a case of advanced breast cancer with a poor prognosis with histological and immunohistochemical characteristics of AdCC with a solid-basaloid component. For the solid-basaloid component, fluorescence in situ hybridization (FISH) analysis revealed rearrangement of the EWSR1 and MYB genes, and immunohistochemical staining indicated MYB positivity. Next-generation sequencing-based technology revealed a novel EWSR1-MYB fusion. To our knowledge, this is the first report of an EWSR1-MYB fusion in AdCC with a solid-basaloid component and a poor prognosis. Our findings may extend the genetic understanding of AdCC and aid in the clinical diagnosis of AdCC.
- Subjects
ADENOID cystic carcinoma; BREAST; FLUORESCENCE in situ hybridization; MYB gene; METASTATIC breast cancer; BREAST cancer prognosis
- Publication
Virchows Archiv: European Journal of Pathology, 2023, Vol 483, Issue 5, p717
- ISSN
0945-6317
- Publication type
Article
- DOI
10.1007/s00428-023-03500-1