- Etiology: malignant neoplasm of striated muscle arising from primitive, undifferentiated mesenchymal cells committed to develop into striated muscle
- Imaging: osseous erosion common
- MRI: intermediate to hypointense on T1WI, intermediate to hyperintense on T2WI, enhances heterogeneously, often has areas of necrosis, prominent high-flow vessels may be present in alveolar subtype, improved conspicuity on DWI
- Complications: metastasis to lung
- Clinical: most common soft tissue sarcoma in children, 50% head and neck / 30% genitourinary / 20% musculoskeletal, embryonal cell type seen in infants is most common, alveolar cell type seen in older children and affects musculoskeletal system and is more aggressive, orbital has best prognosis
Radiology Cases of Musculoskeletal Rhabdomyosarcoma
