Thrombosis of posterior condylar vein with extension to internal jugular vein; a rare radiological finding in traumatic brain injury

The posterior condylar canal is located posterior to the occipital condyle and transmits the posterior condylar vein, one of the largest emissary veins in the retromastoid region.[1,6] This vein usually origins from superior bulb of the internal jugular vein or less frequently from the medial side of the distal portion of the sigmoid sinus and connect to the suboccipital venous plexus.[5,9] We report a patient with occipital bone fracture coursing through the posterior condylar canal causing thrombosis of posterior condylar vein with extension to internal jugular vein. To the best of our knowledge, thrombosis of posterior condylar vein with subsequent extension to major venous sinuses due to trauma has not been reported yet.