Recurrent Spinal Arteriovenous Malformations in a Patient with Cobb Syndrome.

Cobb syndrome is a rare neurocutaneous disease characterized by multiple spinal vascular anomalies and vascular skin lesions affecting the corresponding dermatome. We present a case of a 12-year-old boy with history of spinal arteriovenous malformation (AVM) extending from T4-T5 status post partial embolization 3 years ago and hyperpigmented patch overlying his thoracic back region presenting with 2 days of back pain and lower extremity numbness and weakness. He had multiple Type III AVMs within the spinal and paraspinal tissues involving the T4-T7 vertebral elements, most extensively T4 and T5. The largest aneurysm located at the confluence of the main AVM nidus was a 4 mm anterior spinal artery aneurysm, which was embolized with partial embolization of the main AVM nidus, resulting in complete aneurysm occlusion. This report provides valuable insight on the natural history, recurrence risk, and treatment options of Cobb syndrome to aid in early diagnosis and improve outcomes.