A 31-year-old man with cervical degenerative disc disease was seen at an outside institution for a right selective nerve root block at C7. Following the procedure, he had right ptosis and miosis. Pharmacologic testing confirmed a right Horner syndrome. MRI and MRA showed no arterial dissection. This report documents the unusual occurrence of permanent Horner syndrome following a selective cervical nerve root block.
Department of Ophthalmology, The Methodist Hospital, Houston, Texas.
The authors report conflicts of interest.
Address correspondence to Kevin Kaplowitz, MD, 700 University Boulevard, Galveston, TX 77555; E-mail: email@example.com