Nonaneurysmal subarachnoid hemorrhage due to unfused or twiglike middle cerebral artery rupture: Two case reports

Ryosuke Tashiro, Takashi Inoue, Ichiyo Shibahara, Masayuki Ezura, Hiroshi Uenohara, Miki Fujimura, Teiji Tominaga

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Background An unfused or twiglike middle cerebral artery (MCA) is a congenital anomaly related to the abnormal development of the MCA. An unfused or twiglike MCA can cause both ischemic and hemorrhagic strokes. Previous reports have shown that an unfused or twiglike MCA with coexisting aneurysms can cause subarachnoid hemorrhage (SAH). Cases Two patients presented with nonaneurysmal SAH due to an unfused or twiglike MCA. Both patients had stenosis of the proximal M1 segment of the left MCA and abnormal vascular nets distal to the stenotic lesion. Vasculature distal to the abnormal vascular nets remained grossly normal. These findings were not evident in computed tomography or magnetic resonance angiography. Conclusion An unfused or twiglike MCA can cause nonaneurysmal SAH. Digital subtraction angiography is necessary for accurate diagnosis.

Original languageEnglish
Pages (from-to)e77-e78
JournalJournal of Stroke and Cerebrovascular Diseases
Volume25
Issue number6
DOIs
Publication statusPublished - 2016 Jun 1

Keywords

  • Middle cerebral artery
  • nonaneurysmal
  • subarachnoid hemorrhage
  • twiglike
  • unfused

ASJC Scopus subject areas

  • Surgery
  • Rehabilitation
  • Clinical Neurology
  • Cardiology and Cardiovascular Medicine

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