An unusual relationship of spinal accessory nerve and internal jugular vein - An alert for the oral and maxillofacial surgeon.

Anomalous anatomical relationship of spinal accessory nerve and internal jugular vein can make neck dissection very challenging while removing nodal metastasis in oral cancer. We report here one such situation which was a surprise finding on table. We feel all clinicians encountering internal jugular vein should be aware of this to avoid neurovascular complication.