Symptomatic facet cysts of the subaxial cervical spine.

Subaxial cervical facet cysts are uncommon. We report two patients with intraspinal, extradural, subaxial cervical spinal facet cysts, and review the literature to describe the epidemiology, clinical presentation, imaging findings, and treatment options for these lesions. Intraspinal, extradural, cervical spinal cysts should be considered as part of the differential diagnosis in patients presenting with clinical signs of cervical radiculopathy or myelopathy.