Osteoid osteoma of the patella. Case report and review of the literature.

Osteoid osteoma is a benign, bone-forming tumor. The diaphyses of the long bones are the sites of predilection (at least 50% of all cases occurring in the femur and the tibia). Also this lesion has a male preponderance and the majority of cases present in the second and third decade. We represent an unusual localization of osteoid osteoma in the patella of a 51-year old woman.