title: MR of primary extraosseous Ewing sarcoma.
abstract: We present MR imaging findings of a 15-year-old girl with a history of chronic back pain, proved by biopsy to be caused by primary extraosseous Ewing sarcoma, extending into the spinal epidural space. We also demonstrate the involvement of the adjacent structures and encroachment on the intervertebral foramina.
authors.affiliation: Department of Diagnostic Radiology, Yale University School of Medicine, New Haven, Conn. 06510.
authors.forename: K
authors.initials: K
authors.lastname: Allam
authors.forename: G
authors.initials: G
authors.lastname: Sze
mesh_terms: D000293:Adolescent; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008159:Lumbar Vertebrae / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D016658:Psoas Muscles / Q000473:pathology*; D012512:Sarcoma, Ewing / Q000175:diagnosis*; D012983:Soft Tissue Neoplasms / Q000175:diagnosis*; D013125:Spinal Neoplasms / Q000175:diagnosis*; D013904:Thoracic Vertebrae / Q000473:pathology*