Multidetector CT findings of an extraordinary fenestration of the internal jugular vein.

Fenestration of the internal jugular vein is a rare malformation. Herein, the authors describe an extreme fenestration of the left internal jugular vein. This anomaly was found incidentally in a 47-year-old male patient undergoing multidetector computed tomography (MDCT) imaging and MDCT angiography evaluation for vertebral artery injury due to cervical trauma. MDCT angiography showed the presence of an extremely large fenestration in the left internal jugular vein.