Persistent Local Vasogenic Edema with Dynamic Change in the Regional Cerebral Blood Flow after STA-MCA Bypass for Adult Moyamoya Disease

Kokoro Kawamura, Miki Fujimura, Ryosuke Tashiro, Atsushi Kanoke, Atsushi Saito, Teiji Tominaga

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We report an adult moyamoya disease (MMD) patient who developed persistent local vasogenic edema with dynamic change in the regional cerebral blood flow after left superficial temporal artery-middle cerebral artery (STA-MCA) anastomosis. A 49-year-old woman with ischemic-onset MMD underwent left STA-MCA anastomosis. Magnetic resonance (MR) imaging of fluid-attenuated inversion recovery 1 day after surgery revealed an asymptomatic local high-signal-intensity lesion at the site of anastomosis, and MR angiography demonstrated apparently patent STA-MCA bypass. Due to the increased apparent diffusion coefficient value, we diagnosed the lesion as vasogenic edema. A significant increase in focal cerebral blood flow (CBF) at the site of the anastomosis was observed on N-isopropyl-p-[123I] iodoamphetamine single-photon emission computed tomography (123I-IMP-SPECT) (139.8%; compared with the preoperative value). Under strict blood pressure control (systolic blood pressure under 130 mmHg), the patient remained asymptomatic during the entire peri-operative period, but the 123I-IMP-SPECT 7 days after surgery suggested paradoxical CBF decrease (72.9%). Based on this finding, we allow the patient to be maintained under normotensive condition (∼160 mmHg), which recovered the CBF (115.0%) 14 days after surgery. Vasogenic edema remained during the entire peri-operative period, but completely disappeared 83 days after surgery. Local vasogenic edema formation due to cerebral hyperperfusion is not uncommon after STA-MCA anastomosis for adult MMD, but dynamic CBF change at the site of persistent local vasogenic edema after STA-MCA anastomosis is extremely rare. We recommend serial CBF measurement in the acute stage after revascularization surgery for MMD, especially when MR imaging demonstrates local signal intensity change.

Original languageEnglish
Article number104625
JournalJournal of Stroke and Cerebrovascular Diseases
Issue number4
Publication statusPublished - 2020 Apr


  • Moyamoya disease
  • exreacranial-intracranial bypass
  • hyperperfusion
  • hypoperfusion
  • vasogenic edema


Dive into the research topics of 'Persistent Local Vasogenic Edema with Dynamic Change in the Regional Cerebral Blood Flow after STA-MCA Bypass for Adult Moyamoya Disease'. Together they form a unique fingerprint.

Cite this