PMC9138738_01
Magnetic resonance (MR) images: A. MR T2-weighted images revealed tortuous vascular structures with dark flow voids involving the left parieto-occipital and right parietal lobes (white arrows). B. Time-of-flight MR angiography source revealed a small cluster of vessels in the right insular lobe (white arrow). C. MR T2-weighted images acquired seven years earlier did not show any abnormal vascular structures.
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F1
However, the brain magnetic resonance images (bMRIs) and digital subtraction angiography revealed multiple cAVMs (Figures 1A, 1B, 2 and 3), which were not found in the bMRIs acquired seven years earlier (Figure 1C).
Digital subtraction angiography: A and B. Lateral left carotid angiogram revealed a left parieto-occipital arteriovenous malformation (AVM) with a nidus measuring 55 mm, which was drained via deep (vein of Galen and straight sinus: white arrow) and superficial (cortical veins and superior sagittal vein: white arrowhead) venous systems. C. Lateral vertebral angiogram demonstrated that the AVM was fed by the left posterior cerebral artery as well as the left middle cerebral artery.
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F2
However, the brain magnetic resonance images (bMRIs) and digital subtraction angiography revealed multiple cAVMs (Figures 1A, 1B, 2 and 3), which were not found in the bMRIs acquired seven years earlier (Figure 1C).
Digital subtraction angiography: A and B. Lateral and anteroposterior right carotid angiogram showed arteriovenous malformations (AVMs) in the right insular (white arrowhead) and parietal (white arrow) lobes, measuring 7 mm and 15 mm, respectively. The AVMs were drained though cortical veins to the superior sagittal sinus (black arrow).
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F3
However, the brain magnetic resonance images (bMRIs) and digital subtraction angiography revealed multiple cAVMs (Figures 1A, 1B, 2 and 3), which were not found in the bMRIs acquired seven years earlier (Figure 1C).