case_images: PMC9970684_01
case_images: MRA shows a signal void within the left MCA followed by a normal signal in the distal end of segment M1 of MCA and normal M2 segment (left and right panels, shown by arrow). ICA is seen within normal limits with no evidence of stenosis. Significant collateral circulation is seen bilaterally. . ACA, anterior cerebral artery; BA, basilar artery; ICA, internal carotid artery; MCA, middle cerebral artery; M1, first segment of MCA; M2, second segment of MCA; M3, third segment of MCA; MRA, magnetic resonance angiography; PCA, posterior cerebral artery; VA, vertebral artery
case_images: cureus-0015-00000034314-i01.jpg
case_images: PMC9970684_01_cureus-0015-00000034314-i01.jpg
case_images: FIG1
case_images: Magnetic resonance venography (MRV) showed no signs of dural sinus thrombosis. MRA was notable for left ICA terminus stenosis extending into the proximal left anterior cerebral artery (ACA) and middle cerebral arteries (MCAs) (Figures 1-2), consistent with Moyamoya vasculopathy.
case_images: MRA of the left side circulation, focusing on the signal void within the MCA (arrow), and showing the extensive tortuous collateral circulation from the ECA (arrowheads).. ACA, anterior cerebral artery; ECA, external carotid artery; ICA, internal carotid artery; MCA, middle cerebral artery; M1, first segment of MCA; M3, third segment of MCA
case_images: cureus-0015-00000034314-i02.jpg
case_images: PMC9970684_01_cureus-0015-00000034314-i02.jpg
case_images: FIG2
case_images: Magnetic resonance venography (MRV) showed no signs of dural sinus thrombosis. MRA was notable for left ICA terminus stenosis extending into the proximal left anterior cerebral artery (ACA) and middle cerebral arteries (MCAs) (Figures 1-2), consistent with Moyamoya vasculopathy.