PMID: 12755027May 21, 2003Paper

A case of ruptured and unruptured developing cerebral aneurysms at the bilateral M2 bifurcations five years after surgery for ruptured aneurysm at the end of the azygos anterior cerebral artery

No shinkei geka. Neurological surgery
Masahiro HorieTakashi Watanabe

Abstract

A 36-year-old woman with 4 cerebral aneurysms at unusual sites including bilateral M2 bifurcation aneurysms is reported. She had been in good health in the previous 5 years since the treatment for a ruptured aneurysm at the end of the azygos anterior cerebral artery when she was 31 years old. Five years later, she became comatose with a huge hematoma in the right temporal lobe due to the rupture of the aneurysm at the right M2 bifurcation, which had been very small 5 years ago. She underwent an emergent clipping operation, and then she became alert with motor weakness extremities of on her left-side. Postoperative angiograms revealed a de novo aneurysm at the left M2 bifurcation and an aneurysm at the origin of the lenticulostriate artery, which has remained unchanged for 5 years. An aneurysm at the M2 bifurcation is rare, especially when it is situated bilaterally at the mirror sites. To detect de novo aneurysms, postoperative angiographical follow-up should be considered in patients with multiple aneurysms and in young patients.

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