- Etiology: malignant neoplasm of striated muscle
- Imaging: most often medial-superior quadrant, commonly intracranial extension + osseous destruction
- MRI: intermediate to hypointense on T1WI, intermediate to hyperintense on T2WI, enhances heterogeneously, improved conspicuity on DWI
- Complications: metastasis to lung
- Clinical: most common childhood soft tissue sarcoma, 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
Pediatric Imaging 