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[Information concerning radiation-induced sarcomas. Report on 2 cases].

Two cases of radiation-induced sarcomas are presented. Osteosarcomas developed in the frontal bone after a latency period of 36 years following operation for brain tumor with post-operative irradiation (48 Gy) in one patient and in the region of the right sacro-iliac joint after ablation of testis for seminoma with post-operative irradiation (60 Gy) in another patient. In the literature, the risk of developing an irradiation-induced sarcoma is considered to be low (0.05-0.2%). Both cases, however, underline the necessity of an exact indication for irradiation to avoid such complications.