Osteoid Osteoma of the Acetabulum

The acetabulum is a very rare location for osteoid osteoma. Reported herein is the case of a 21-year-old man who had nonspecific hip pain. Preoperative diagnosis was made 2 months after the first visit. Excisional biopsy was performed through the inner wall of the acetabulum. The patient reported complete relief from pain and there has been no evidence of recurrence in 8 years of followup.