An uncommon osteoid tissue-forming primary neoplasm of the bone.

Usually benign.

Rare bone tumour.

Patients usually present with pain of several months' duration.

Pain is usually not worse at night, and not relieved by salicylates (like aspirin and other related compounds).

If lesion is superficial, the patient may have localized swelling and tenderness.

Spinal lesions can cause painful scoliosis, although this is usually not that common with osteoblastomas.

Lesions may mechanically interfere with the spinal cord or nerve roots, producing neurologic deficits.

Treatment can involve either surgery or radiation therapy, but radiation therapy may produce postirradiation sarcoma.