Aneurysmal Bone Cyst of the Cervical Spine in Children

Abstract

Approximately 50% of patients with aneurysmal bone cyst of the spine are in the pediatric age group. Aneurysmal bone cyst is considered a locally aggressive benign tumor that may involve the posterior and anterior elements of the spine. Intralesional extended curettage and bone-grafting is the mainstay of treatment of aneurysmal bone cysts involving the long bones. However, the proximity to neurovascular structures and the potential remaining growth of the spine make its management in the spine more challenging. We evaluated the clinical presentation and the results of surgical treatment, following complete intralesional curettage along with spinal arthrodesis in pediatric patients with aneurysmal bone cysts of the cervical spine. We retrospectively reviewed the cases of seven children who were surgically treated for a primary aneurysmal bone cyst of the cervical spine between 1988 and 2008. There were four boys and three girls who had a mean age of 11.9 years (range, eight to 16.2 years) at the time of diagnosis. The mean duration of follow-up was 46.5 months (range, twenty-six to ninety-eight months). The mean age at the time of follow-up was sixteen years (range, 10.6 to 24.6 years). Neck pain was the most common presenting symptom, and radiculopathy was the most common finding on physical examination. Radiographs, computed tomography, and magnetic resonance imaging were highly suggestive for the diagnosis that was confirmed histologically in all patients. The majority (four) of the patients required combined anterior and posterior approaches for complete removal of the tumor and arthrodesis of the spine. Two patients required additional procedures: one for a local recurrence and one for nonunion of the atlantooccipital junction. All patients were free of evidence of recurrent disease at the time of the last follow-up. With the exception of one patient who had permanent Horner syndrome, all patients were asymptomatic. Preoperative arterial embolization, complete tumor excision by intralesional curettage and burring, followed by local spinal fusion, yield satisfactory results with a low rate of complications and low recurrence in children with an aneurysmal bone cyst of the cervical spine.