Missed cervicocephalic dissections and the role of digital subtraction angiography and MRA with vessel wall imaging

Abstract

Non-traumatic arterial dissection exhibits a propensity for the Asian population and predominantly affects the posterior circulation. Regrettably, during the initial fortnight prior to diagnosis, approximately one in thirty cervicocephalic artery dissections (CAD) are misdiagnosed. Overlooked CAD, more prevalent in the younger demographic, can result in severe complications such as ischemic stroke, subarachnoid hemorrhage, and possibly death. Comprehensive investigations are necessary to prevent overlooking such a diagnosis. Digital subtraction angiography (DSA) is universally acknowledged as the most efficacious technique for assessing luminal morphology and hemodynamics, but may miss the vessel wall characteristics, an important component for diagnosing dissection. Magnetic resonance angiography (MRA), conversely, is less invasive and can assess vessel wall properties. A high-resolution MRA with vascular wall imaging can efficiently identify conditions such as intimal flaps, double-lumen signs, intramural hematomas, mural thrombi, and pseudoaneurysms, aiding in the evaluation of suspected CAD. MRA with vascular wall imaging and DSA complement each other in the identification and characterization of cerebral artery dissections, both contributing to treatment. In cases of undefined stroke etiology, particularly among the young demographic, utilizing both tests (when one yields no significant findings) may assist in detecting overlooked instances of CAD. The prompt identification and treatment of CAD are essential, particularly for surgical intervention and to avert recurrence in predisposed patients. Identifying the etiology of a stroke or transient ischemic attack is important for providing precise therapy and preventing recurrence.

Keywords

magnetic resonance angiography / cervicocephalic artery dissections / digital subtraction angiography

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