Abstract Purpose: Variations of circle of Willis are not rare. Study is done with an aim to assess the pattern of the component vessels of its anterior part with regard to Right- Left variations and compare with other studies. Material and method: 56 formalin fixed cadavers were analyzed. The diameter, length and variations of the following vessels were measured: Anterior Cerebral Artery (proximal A1 segment to distal A2 segment), anterior communicating artery and photographed for documentation. Statistical analysis was done by statistica software. Result: 53.57% had normal anterior cerebral artery- anterior communicating artery complex. Length and diameter were slightly more on left side. Unilateral hypoplasia, Azygos and Tripple Anterior Cerebral Artery was present in 21.43%, 3.57 and 1.78% respectively. In specimens, no aplasia of Anterior Cerebral Artery was present. Aplastic, double and fenestration type anterior communicating artery were present in 5.3%, 8.92% and 1.78% respectively. Conclusion: Anatomical knowledge of variations should be updated regularly for neurosurgeons, radiologists and clinicians to avoid unexpected consequences.
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Saha et al. (2024) studied this question.
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