PMC6601121_01
(A) MRA (maximum intensity projection) and (B) CTA (volume rendering technique) images, respectively, showing hypoplastic left ICA with reconstitution of flow in left MCA and anterior cerebral artery (ACA) from left PCoM. Left MCA, ACA, and their branches are small in caliber with paucity of M4 branches of MCA
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F1
Magnetic resonance imaging (MRI) of brain revealed patchy small acute ischemic foci involving deep gray matter nuclei and cortex in left cerebral hemisphere with small caliber left ICA showing normal wall thickness [Figures 1A and 2A]. Computed tomography angiography (CTA) revealed hypoplastic left ICA from its origin with small left bony carotid canal [Figure 1B].
Axial fluid-attenuated inversion recovery images show infarcts (A) left cortex and (B) deep gray matter nuclei. (C) Follow-up scan after 11 months:T2-weighted axial image shows left-sided atrophy with gliosis
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F2
Magnetic resonance imaging (MRI) of brain revealed patchy small acute ischemic foci involving deep gray matter nuclei and cortex in left cerebral hemisphere with small caliber left ICA showing normal wall thickness [Figures 1A and 2A]. MRI scan after approximately 11 months revealed resolution of previous lesions with gliosis and mild volume loss in left cerebral hemisphere and residual encephalomalacic changes in left basal ganglia and deep watershed zone [Figure 2B]. Mild prominence of left lateral ventricle was also noted.