Aneurysmal bone cysts of the vertebrae.

PURPOSE To review records of 14 patients with aneurysmal bone cysts (ABCs) of the spine. METHODS Using the Scottish Bone Tumour Registry for the period of October 1952 to November 2005, records of 9 females and 5 males aged 8 to 63 (mean, 25.3) years who had ABCs of the spine and were followed up for a mean of 7.1 years were reviewed. RESULTS The most commonly involved site was the lumbar vertebrae (n=6), followed by the thoracic (n=4), cervical (n=3), and sacral (n=1) vertebrae. The mean duration of symptoms at presentation was 8.8 (range, 0.3-24) months. The symptoms included gradually increasing pain in the back (n=14), a palpable spinal mass (n=4), spinal deformity (n=2), and neurological deficits (n=5). All the patients underwent surgery: intra-lesional excision (curettage) without bone grafting (n=3), excision (n=7, 2 of whom had adjuvant radiotherapy), and open excisional biopsy (n=4, 2 of whom had iliac crest bone grafting). One patient with a cervical ABC underwent preoperative angiographic embolisation. Another patient with a sacral ABC underwent percutaneous sclerotherapy. Two patients had recurrence. One had recurrence within 4 months and underwent adjuvant radiotherapy; another had recurrence 16.8 years later and underwent repeat curettage. No major complications were encountered. CONCLUSION Most ABCs of the spine occurred in young females. Intra-lesional excision was an effective treatment.