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From 1974 to 1988, four patients with chondrosarcomas of the petrous apex were followed. Average age was 46 years (range, 30 to 61), one man and three women. The mean delay between the first patient's symptoms and the visit was 18 months (range, 15 to 24). The surgical treatment consisted of two infratemporal approaches (type A), one transcochlear approach, and one partial excision by retrofacial route. For the four patients, the surgery was followed by cobalt therapy. Three of four patients are alive and one patient died 5 years later of a cerebrovascular lesion and bilateral acute parotiditis. None presented with a recurrent disease.