title: Successful treatment of a radiation-associated extradural osteosarcoma with chemotherapy in an adolescent girl.
abstract: Bone sarcomas are the most common second malignant neoplasms in survivors of a malignant solid tumor in childhood. In contrast to de novo tumors, secondary bone cancers are typically associated with a poor prognosis, reflecting both a preponderance of primary sites that preclude complete resection in the flat bones of the axial skeleton, and the tendency for local invasiveness or distant metastasis. We describe a patient who developed malignant extradural osteosarcoma of the temporal bone 6 years after successful treatment for a malignant cerebellar astrocytoma with surgical resection and local irradiation. A complete resection of the sarcoma was not possible; however, she achieved a biopsy-proven complete response after intensive chemotherapy with ifosfamide, followed by cisplatin and doxorubicin. At age 13, she remains free of recurrence 3 years after completing all therapy. In view of the rarity of prolonged disease control after incomplete resection for osteosarcoma, this report suggests the value of intensive combination chemotherapy in achieving a durable unmaintained remission in our patient.
authors.affiliation: Department of Hematology/Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38101.
authors.forename: S J
authors.initials: SJ
authors.lastname: Kellie
authors.forename: R E
authors.initials: RE
authors.lastname: Hutchison
authors.forename: J T
authors.initials: JT
authors.lastname: Robertson
authors.forename: C B
authors.initials: CB
authors.lastname: Pratt
mesh_terms: D000293:Adolescent; D001254:Astrocytoma / Q000532:radiotherapy; D001859:Bone Neoplasms / Q000188:drug therapy* / Q000473:pathology; D002528:Cerebellar Neoplasms / Q000532:radiotherapy; D005260:Female; D006801:Humans; D009381:Neoplasms, Radiation-Induced / Q000188:drug therapy* / Q000473:pathology; D012516:Osteosarcoma / Q000188:drug therapy* / Q000473:pathology; D011878:Radiotherapy / Q000009:adverse effects*