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Anatomical Variations in Circle of Willis in Patients Undergoing CT Cerebral Angiography in a Tertiary Hospital in

Prajwal Dhakal1, Prakash Kayastha2, Sharma Paudel2

  • 1Department of Radiology and Imaging, HAMS hospital, Kathmandu, Nepal.

JNMA; Journal of the Nepal Medical Association
|September 10, 2021
PubMed

Insights

Anatomical variations in the Circle of Willis are common, affecting over half of patients. Identifying these variations, like a hypoplastic posterior communicating artery, is vital for managing brain vascular pathologies.

Area of Science:

  • Neurology
  • Radiology
  • Vascular Anatomy

Background:

  • Variations in the Circle of Willis are frequently observed during computed tomography angiography.
  • Accurate identification of these variations is critical for managing cerebrovascular diseases.
  • This study focuses on the Nepal population.

Purpose of the Study:

  • To determine the prevalence of anatomical variations in the Circle of Willis.
  • To investigate the occurrence of aneurysms and other vascular pathologies.
  • To assess the utility of CT angiography in detecting these variations.

Main Methods:

  • A descriptive cross-sectional study was conducted with 95 patients.
  • Convenient sampling was used at Tribhuvan University Teaching Hospital.
  • CT angiographic images were analyzed for Circle of Willis variations and vascular pathologies using SPSS.

Main Results:

  • Anatomical variations of the Circle of Willis were present in 54.7% of patients.
  • The most common variation was a hypoplastic posterior communicating artery (34.7%).
  • Aneurysms were identified in 23.2% of the cases.

Conclusions:

  • CT angiography is effective for detecting Circle of Willis variations and cerebral aneurysms.
  • Recognizing these anatomical variations is crucial for surgical planning and patient management.
  • Multidetector CT provides valuable insights into cerebrovascular anatomy.
Abstract

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