[Characteristics of collateral circulation in adult moyamoya disease based on modified Suzuki staging].

Objective: To investigate the characteristics of collateral circulation in adult moyamoya disease (MMD).

Methods: The clinical data were collected from all adult patients with MMD undergoing digital subtractive angiography (DSA) in our department from 2006 to 2016. Based on the imaging findings, the patients were divided into ischemia group and bleeding group.