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Outcome of Radiation-Related Osteosarcoma After Treatment of Childhood and Adolescent Cancer: A Study of 23 Cases

From the French Society of Pediatric Oncology, Paris, France.

Address reprint requests to Chantal Kalifa, MD, Service d'Oncologie Pédiatrique, Institut Gustave Roussy, 39 rue Camille Desmoulins, 94805 Villejuif, France; email kalifa{at}igr.fr

PURPOSE: We analyzed the clinical features and outcome of patients with radiation-associated osteosarcoma treated during the era of contemporary chemotherapy.

PATIENTS AND METHODS: The characteristics and outcome of 23 patients (17 males and six females) treated during childhood or adolescence for a solid tumor who later developed osteosarcomas within the radiation field between 1981 and 1996 were reviewed.

RESULTS: The median dose of radiation delivered to the first cancer was 47 Gy. Nineteen patients also received chemotherapy. The median time between radiotherapy and the diagnosis of secondary osteosarcoma was 8 years. Histologic slide review showed conventional central osteosarcoma with various differentiation patterns in 21 cases, together with one case of high-grade surface osteosarcoma and one of periosteal osteosarcoma. The sites of involvement were the craniofacial bones in six cases, the first cervical vertebra in one, the girdle bones in seven, and the extremities of long bones in nine. Three patients had metastatic disease at the diagnosis of osteosarcoma. Palliative therapy was administered to seven patients. The aim of treatment was curative for 16 patients, two of whom underwent amputation without further therapy. Intensive chemotherapy regimens were administered to 14 patients before and/or after surgery. Fifteen patients achieved complete surgical remission. Twelve patients were alive and disease-free at a median follow-up duration of 7.5 years. Overall and event-free survivals at 8 years were 50% and 41%, respectively.

CONCLUSION: Patients with radiation-related osteosarcoma and resectable lesions can be cured with surgery and intensive preoperative and postoperative chemotherapy.

Presented in part at the Annual Meeting of the International Society of Pediatric Oncology, Vienna, Austria, October 1-5, 1996.

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