Aneurysmal bone cysts are uncommon bony lesions of the spine. Two such
patients are reported in the study. The first patient had involvement
of first and second thoracic vertebrae, and a preoperative diagnosis
was made possible due to the typical magnetic resonance imaging appear
ances. A total removal was achieved in two stages. In the second patie
nt the C2 spinous process was involved, and this patient presented as
atantoaxial dislocation. Removal of the abnormal tissue and posterior
fusion was done. Both the patients showed neurologic improvement. The
relevant literature is reviewed.