FIG. 2.

Case 1. A: Neuroendoscopic image before intravenous injection of ICG showing blood blister–like vessel (white dashed arrow) and dilated and tortuous vessels (white arrow) on the lateral ventricle wall. B: Neuroendoscopic image after intravenous injection of ICG showing the invisible moyamoya vessels hiding in the subependyma on the lateral ventricle wall (black arrows). The dilated and tortuous vessel is connected by a vessel hidden in the subependyma with a blood blister–like vessel (black arrows).