An osteoid osteoma of the cervical spinal pedicle is rare and carries a high surgical risk because of the close anatomic relationship
to the spinal cord, nerve root, and vertebral artery. We report the case of a 12-year-old girl with an osteoid osteoma of
the C2 pedicle. Computed tomograms showed an oval nidus and marked sclerosis around this lesion at the right C2 pedicle. There
also was expansion of the medial and inferior cortical bone of the C2 pedicle. After failure of nonoperative treatment, we
planned surgery. Owing to concerns regarding thermal damage to the spinal cord, nerve root, and/or vertebral artery using
computed tomography (CT)-guided radiofrequency ablation, we curetted the nidus using a navigation system. Twenty-eight months
after surgery, her pain was relieved with no limitation of cervical movement and there has been no evidence of recurrence.
Navigation allowed safe curettage of the nidus through a small hole while maintaining spinal stability.
Each author certifies that he or she has no commercial associations (eg, consultancies, stock ownership, equity interest,
patent/licensing arrangements, etc) that might pose a conflict of interest in connection with the submitted article.
Each author certifies that his or her institution has approved the reporting of this case report, that all investigations
were conducted in conformity with ethical principles of research, and that informed consent for participation in the study
was obtained.
This work was performed at Tottori University.