PMC3785340_01
3 Dimension-Computed Tomography angiography showed saccular aneurysmal dilatation in the left A1-A2 junction (arrow), and bilateral A2 segment were ill-defined (A). In the cross section of the aneurysm, dissecting intima was observed (arrow) (B).
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In the 3D-CT angiography, dissecting intima was observed in the area with saccular enlargement (Fig. 1).
Left internal carotid angiography demonstrated saccular aneurysmal dilatation in the left A1-A2 junction (arrowhead) (A and C). At its periphery, a small saccular bulge was observed unclearly (arrow). Late arterial phase showed retrograde filling of peripheral portion of left ACA and a small saccular bulge in the peripheral portion was detected better (B and D).
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In the left internal carotid angiography, saccular cerebral aneurysm was observed in the left A1-A2 junction (Fig. 2).
Right internal carotid angiography demonstrated saccular aneurysmal dilatation in the left A1-A2 junction (arrowhead) (A and C). The pericallosal artery were occluded and late arterial to capillary phase revealed retrograde filling of peripheral portion of left ACA and small saccular bulge (arrow) (B and D).
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Right internal carotid angiography showed cerebral aneurysm at the left A1-A2 junction (Fig. 3).