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Bilobed saccular aneurysm of the anterior communicating artery opposite the origin of the left anterior cerebral artery, it measures about 1 x 0.3 cm, it has a narrow neck measuring about 3mm, with its fundus projecting anteriorly and inferiorly. No thrombosis or contrast extravasation.
Attenuated/spastic proximal segments of the right A1 and both A2 segments.
Dominant left vertebral artery.
Hypoplastic right P1 segment with continuation of the right PCOM artery (feral origin, which is a normal variant).