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Here we report a unique case of bilateral ganglion cysts originating from the ligamentum flavum in the cervical spine. Degenerative cysts of the ligamentum flavum are rare lesions, and most had been reported in the lumbar spine. Its occurrence in the cervical spine is extremely rare: only eight have been reported. A 66-year-old male patient presented with progressive paraparesis, pain, and paresthesia in his bilateral T1 dermatomes that had lasted for three weeks. Magnetic resonance imaging of the cervical spine demonstrated a well-demarcated cystic lesion in the bilateral dorsolateral aspects of the C7/T1 segment and significant compression of the cervical cord. All case reports of ganglion cysts of the cervical ligamentum flavum including the present one showed characteristic symptoms and signs of myelopathy such as paraparesis or quadriparesis associated with varying degrees of paresthesia or pain in the upper extremities. Ganglion cysts of the cervical ligamentum flavum are considered a cause of cervical radiculomyelopathy due to cervical intraspinal cystic lesions. Bilateral occurrence and associated subluxation of the involved cervical segments again support the degenerative pathogenesis of ganglion cysts of the ligamentum flavum in the cervical spine.

Bilateral Ganglion Cysts of the Ligamentum Flavum in the Cervical Spine Causing a Progressive Cervical Radiculomyelopathy and Literature Review