Surgical management of dumbbell tumors of the cervical spine.

Twelve patients with benign dumbbell tumors of the cervical spine were treated surgically between March 1991 and July 1994. Gross total resection was achieved in 11 patients, using a single-stage modified posterior midline exposure with laminectomy and complete unilateral facetectomy. This exposure provides contiguous intraspinal, foraminal, and extraforaminal access that extends up to 4 cm from the lateral dural margin. The surgical considerations of these tumors, including the surgical technique, potential spinal instability, vertebral artery, and risk of nerve root injury, are presented.