PurposeTo evaluate the clinical and imaging outcome of aneurysmal bone cysts (ABCs) in children using percutaneous cryoablation as the sole treatment. Materials and MethodsThis retrospective study included 7 children with a mean age of 8.7 years (range, 3.0–11.9 years) who underwent at least 1 cryoablation for ABC. Cryoablation needles were placed and guided by computed tomography (CT). Imaging follow-up and clinical examination were performed by radiography 1 and 6 months after the procedure and magnetic resonance (MR) imaging was performed 3 and 12 months after the procedure. Additional cryoablation was performed in case of MR imaging–detected recurrence. Data were analyzed by anatomical location, measurement of lesion volume, numbers of intralesional cysts, grade of mineralization (5-point Likert scale), pain (0 [none] to 4 [severe]), and grade of fluid-fluid levels (FFLs; 4-point Likert scale). ResultsFourteen cryoablations were performed. Patients showed volume reduction, with 1 showing a complete response and 6 showing partial response. Following treatment, there was a substantial reduction in lesion volume compared with baseline, leading to a mean volume decrease of 81.9% (range, 66.8%–100%). The grade of mineralization (3.2 [SD ± 1.2] after therapy vs 1.1 [SD ± 0.3] at baseline), grade of FFL (1.6 [SD ± 0.5] after therapy vs 3.4 [SD ± 1.1] at baseline), and pain (0.29 [SD ± 0.4] after therapy vs 1.86 [SD ± 0.7] at baseline) significantly improved after therapy (all P < .05). One severe adverse event occurred. ConclusionsCryoablation is an effective treatment option for ABC in children. Further research is needed to compare it with other techniques.