Spinal accessory (11th) nerve palsy following carotid endarterectomy.

We report three cases of ipsilateral spinal accessory nerve palsy complicating carotid endarterectomy. Awareness of this cranial nerve injury, as a complication of this common surgical procedure, can lead to early diagnosis and avoids unnecessary investigations. This should be considered whenever such patients complain postoperatively of ipsilateral shoulder pain/weakness or "aching" about the ear, even if some time has elapsed since surgery.