title: Case report: A rare case of Ewing's sarcoma and osteosarcoma at different sites 10 years apart.
abstract: Ewing's sarcoma of bone and osteosarcoma are rare tumors. A combination of high-grade osteosarcoma and Ewing's sarcoma of bone in anatomically unrelated sites is unique, especially in the absence of previous radiation or retinoblastoma. We present a patient with a rare case of Ewing's sarcoma of the scapula that showed no evidence of recurrence (after 10 years of continued followup) and who subsequently presented with a primary osteosarcoma of the femur.
authors.affiliation: Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA.
authors.forename: Harish S
authors.initials: HS
authors.lastname: Hosalkar
authors.forename: Alfred
authors.initials: A
authors.lastname: Atanda
authors.forename: Julieta
authors.initials: J
authors.lastname: Barroeta
authors.forename: Jesse T
authors.initials: JT
authors.lastname: Torbert
authors.forename: Richard D
authors.initials: RD
authors.lastname: Lackman
mesh_terms: D000328:Adult; D001707:Biopsy, Needle; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D003131:Combined Modality Therapy; D005260:Female; D005269:Femur; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry; D008279:Magnetic Resonance Imaging / Q000379:methods; D009367:Neoplasm Staging; D009378:Neoplasms, Multiple Primary / Q000473:pathology* / Q000628:therapy; D012516:Osteosarcoma / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D035583:Rare Diseases; D018570:Risk Assessment; D012512:Sarcoma, Ewing / Q000000981:diagnostic imaging / Q000473:pathology* / Q000601:surgery; D012540:Scapula; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D016896:Treatment Outcome