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FIG 1. Case 25: 28-year-old man with SAH.
A and B, DSA (A) and MR angiogram (B) immediately after SAH reveal a 1-mm aneurysm (arrow) at the paraclinoid portion of the internal cerebral artery, which was missed at initial examination and was detected on review at a follow-up examination 2 weeks later.
C and D, Two-week follow-up examination with DSA (C) and MR angiography (D) reveals a 3-mm aneurysm (arrow) in the same area. The size of the aneurysm grew rapidly during those 2 weeks. The aneurysm was confirmed and clipped during surgery.
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