ARRS 2022 Abstracts

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E1152. Neurovascular Variants: Common Pitfalls and What to Watch Out For
Authors
  1. Alex Wang; University of Texas Health San Antonio
  2. Javier Eduardo; University of Texas Health San Antonio
  3. Achint Singh; University of Texas Health San Antonio
Background
With the increasing prevalence of CT and MR angiographic imaging, the recognition of intracranial variant vascular anatomy is important for the radiologist to avoid misdiagnosis and unnecessary additional workup. The ability to identify variant anatomy can have significant clinical consequences. The presence of specific variant anatomy has implications for pre-operative planning, preventing catastrophic vascular injury. Furthermore, the presence of other vascular variants can predispose to specific patterns of injury, increasing the radiologist's sensitivity for detection. We explore the common and uncommon intracranial variant vascular anatomy using high quality angiographic images and diagrams. Learners will be presented with the clinical significance and consequence of each variant anatomy with high quality case-based examples.

Educational Goals / Teaching Points
After reviewing the exhibit, the learner will understand the imaging appearance of common and uncommon CNS variant vascular anatomy. The correct terminology and a description of the course of the variant will be presented. The learner will understand the clinical significance and pathology, as it relates to the vascular variants. Diagrams will be presented to characterize and reinforce understanding.

Key Anatomic/Physiologic Issues and Imaging Findings/Techniques
High quality, multi-modality, angiographic images will showcase vascular anatomic variants involving the internal carotid artery (ICA), anterior, middle, and posterior cerebral arteries (ACA, MCA, PCA), communicating arteries, and vertebrobasilar system. Diagrams will showcase the origin and course of the variant anatomy. The clinical significance related to variant anatomy (e.g., infarcts, vascular loops) and importance for preoperative planning will be shown and discussed with CT and MRI.

Conclusion
Recognizing variant vascular anatomy has significant implications for patient care. Learners will be able to identify variant intracranial vascular anatomy as well as the clinical significance that relates to each variant. Learners will become confident in the terminology used as well as the ability to describe the course of the variant.