Osteoid osteoma: report of a case.

An osteoid osteoma on the foot diagnosed by clinical, pathologic, and radiographic evaluation was described. The lesion is found predominantly in the long bones of the foot. A differential diagnosis of osteoma, osteoblastoma, and osteogenic sarcoma must be ruled out in order for proper management of the patient. The case of a solitary, bony lesion located at the base of the proximal phalanx of the fifth toe in a 38-year-old, white female was presented. No evidence of malignancy was found. The lesion was a hard, painful, palpable mass, located in the fourth left web space, and was excised completely. The skin defect was closed in order for proper syndactilization of the adjoining fourth and fifth digits. Two years post-operatively, the patient was asymptomatic with no evidence of reoccurrence.