Abstract
OBJECTIVE: The Aneurysmal Bone Cyst (ABC) is a benign yet aggressive bone tumor. This study aimed to evaluate sex, age, tumor location, tumor size, type of treatment (surgical, infiltration, embolization), and recurrence. METHODS: Descriptive and quantitative statistical analyses were applied. The prevalence ratio and 95% confidence interval were calculated for the association between recurrence and sex, age, tumor size, Capanna's classification, and treatment type. RESULTS: Twenty-three cases of ABCs were included, eleven (47.8%) females and twelve (52.2%) males. The mean age of treated patients was 11.2±1.8 years. Most cysts were located in the lower limbs (56.5%). The mean follow-up time was 42.8±14.01 months. The mean cyst diameter at the beginning of treatment was 5.58± 1.04 cm; of these, 17.4% were up to 3 cm, 43.5% from 3.1 to 6 cm, and 39.1% over 6 cm. Regarding initial treatment, 6 (26%) patients received infiltration, and in total 20 (86.9%) underwent surgery with bone grafting. The overall recurrence rate was 30.4%. No association was identified between recurrence and the variables studied (p ≥ 0.05). The epidemiological data obtained are consistent with pediatric cohorts reported in the literature. CONCLUSION: All evaluated methods are suitable for treating aneurysmal bone cysts. Level of Evidence IV; Case Series.