Customized 3D-printed drill guide for surgical resection of osteoid osteoma in the ischiopubic ramus.

Osteoid osteoma is a common benign tumour. It mainly affects the long bones and spine. The pelvic ring is a rare localization for it. We report the case of a 24-year-old woman who complained of buttock pain, mainly nocturnal and resistant to the usual medical analgesic treatment and radiating to the lateral region of the left hip. Pelvis X-rays and computed tomography scan showed an osteoid osteoma located in the left ischiopubic ramus. We performed a minimally invasive resection of this tumour using a custom-made 3D-printed drill guide. We noted no operative incidents, and the patient no longer complained of tumour-related pain in the immediate postoperative period. At 24-month follow-up, the patient was pain-free and we did not note recurrence of the tumour. The 3D printing of a customized guide for surgical drilling of an osteoid osteoma with a rare and deep-seated location such as the pelvis is an interesting alternative in its nonconservative treatment.