Abstract
Rhabdomyosarcomas (RMS) are malignant mesenchymal tumors with skeletal muscle differentiation which are classified into alveolar, embryonal, pleomorphic, and spindle cell/sclerosing RMS. Within the spindle cell/sclerosing RMS tumor type there is a recently recognized sub-type categorized as intraosseous spindle cell RMS with TFCP2/NCOA2 gene fusion. This rare tumor is highly aggressive with predominant involvement of the craniofacial and pelvic bones with approximately 30 cases reported to date. Histopathologic features include spindle cell and epithelioid morphology with a characteristic co-expression of epithelial markers, myogenic markers, and ALK1 expression. We report two cases of gnathic spindle cell/sclerosing RMS with FUS::TFCP2 gene fusion that were initially interpreted as carcinomas by referring institutions and later reclassified when encountered in our practice after additional work-up and molecular characterization.
Original language | English (US) |
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Pages (from-to) | 430-436 |
Number of pages | 7 |
Journal | Genes Chromosomes and Cancer |
Volume | 62 |
Issue number | 7 |
DOIs | |
State | Published - Jul 2023 |
Externally published | Yes |
Keywords
- FUS::TFCP2 Fusion
- Intraosseous spindle cell RMS
- Rhabdomyosarcoma (RMS)
- Spindle cell/sclerosing RMS
- TFCP2
ASJC Scopus subject areas
- Genetics
- Cancer Research