In a patient without specific neurological symptoms, ultrasound demonstrates an intimal echogenic flap in the common carotid artery.

Color Doppler and Duplex ultrasound images showed patent vessels without thrombus, a biphasic wave with an atypical spectral signal and hemodynamically non-significant stenosis. CT angiography with contrast confirmed the findings.

Doppler ultrasound helps in the early diagnosis. CT angiography correlation is the gold standard for its diagnosis - confirming the echographic findings, classifying the dissection and evaluating complications. 

Early diagnosis is important because dissection is a risk factor for recurrent embolic cerebrovascular events.