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Figure 5: (e1 and 2) Type E: A 24-year-old female with migraine, for exclusion of vascular lesion: ACA forms a common trunk (arrow) and split distally into two post-communicating segments. (g1 and 2) Type G: A 52-year-old male with transient visual disturbance, suspected of CVA hypoplasia or absence of an AcomA (circle). (h1 and 2) Type H: A 53-year-old male with two episodes of gait unsteadiness, suspected of CVA: One pre-communicating segment of an ACA is hypoplastic or absent and the other pre-communicating segment (triangle) gives rise to both post-communicating segments of the ACAs

Figure 5: (e1 and 2) Type E: A 24-year-old female with migraine, for exclusion of vascular lesion: ACA forms a common trunk (arrow) and split distally into two post-communicating segments. (g1 and 2) Type G: A 52-year-old male with transient visual disturbance, suspected of CVA hypoplasia or absence of an AcomA (circle). (h1 and 2) Type H: A 53-year-old male with two episodes of gait unsteadiness, suspected of CVA: One pre-communicating segment of an ACA is hypoplastic or absent and the other pre-communicating segment (triangle) gives rise to both post-communicating segments of the ACAs