Prevalence of Morphological Variations of Posterior Communicating Artery and its Association with Age, Sex, and Laterality using Magnetic Resonance Angiography: A Cross-sectional Study

Introduction: The Posterior Communicating Artery (PCoA) is a vital component of the circle of Willis, providing collateral circulation between the anterior and posterior cerebral circulations. Morphological variations such as hypoplasia, aplasia, foetal-type configuration, and duplication may influence cerebral haemodynamics and predispose individuals to neurovascular disorders. Magnetic Resonance Angiography (MRA) allows accurate non-invasive assessment of these variations. Aim: To determine the prevalence of PCoA morphological variations and assess their association with age, sex, and laterality using Time-Of-Flight Magnetic Resonance Angiography (TOF-MRA). Materials and Methods: The present cross-sectional study included 150 patients who underwent brain MRA between May 2024 and August 2025 in department of Radiology, Dhiraj hospital, BK Shah Medical Institute and Research Centre, Sumandeep Vidyapeeth Deemed to be University, Vadodara, Gujarat, India and excluded those with cerebrovascular abnormalities confirmed by clinical evaluation and imaging review. High-resolution 1.5T TOF-MRA images were analysed for PCoA morphology and classified into normal, hypoplasia (