Multicentric giant cell tumor of bone: a case report and review of the literature.

Multicentric giant cell tumor of bone is the rare variant of a lesion that is relatively common in a skeletally mature population. An otherwise healthy 13-year-old boy presenting with this entity was followed up for 6 years. During this period, the patient was diagnosed with and treated for six individual lesions. One recurrence required resection, Ilizarov bone lengthening, and subsequent ankle arthrodesis. He remains fully active and free of distant metastasis.