[Companacci classification and result of treatment for aneurysmal bone cyst].

Results of treatment of 17 patients operated because of aneurysmal bone cyst have been assessed. Age at the onset of symptoms ranged from 4 to 39 years, 14 on an average. There were 6 aggressive and active cysts in this series according to the Campanacci classification. Treatment consisted of segmental resection of the bone in 5 patients, curettage of the lesion filing of the defect with autogenous bone in 11 cases. Recurrence of the cyst has been observed in 3 patients, only one of them had aggressive type of tumor.