Persistent Periventricular Anastomosis Associated With Rebleeding After Bypass Surgery for Hemorrhagic Moyamoya Disease.

ABSTRACT:

Background

Although bypass surgery can reduce rebleeding risk in hemorrhagic moyamoya disease, the risk remaining after surgery is not negligible. We hypothesized that the postoperative persistence of periventricular anastomosis (PA), a fragile periventricular collateral manifestation, is associated with rebleeding.

Methods

This retrospective cohort study included patients with moyamoya disease who underwent direct bypass at 2 institutions after hemorrhagic presentation. Either presence or absence of PA after surgery was radiologically determined by grading of each subtype, lenticulostriate, thalamic, or choroidal anastomosis, 3-6 months after surgery. The time interval between the surgery and the rebleeding event or last visit was calculated.

Results

Of 116 eligible

SUBMITTER: Hamano E 

PROVIDER: S-EPMC12671628 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature