Osteoid osteoma is a benign tumor of the bone tissue that is usually of small dimensions (< 2cm). It is characterized by a central vascularized nucleus called “nidus”, surrounded by reactive bone tissue. The nidus microscopically resembles an osteoblastoma. It usually appears as a very painful, single lesion, and, clinically, through continuous nightly pain. It responds to therapy with anti-inflammatory non-steroid drugs.
The main advantages of the Magnetic Resonance guided Focused Ultrasound Surgery (MRgFUS) for the treatment of osteid osteoma are:
- it does not utilize ionizing radiations;
- drastically reduced invasiveness (absence of incisions or punctures on the cutis: the cutis remains whole in the treatment);
- immediate pain relief.