Cerebral angiography. Unusual connection and disconnection

A 61-year-old woman underwent MRI scan of brain (Figure 1A), followed by conventional angiography (Figures 1B & 1C) and magnetic resonance cerebral angiography (Figure 1D, conventional angiography was performed for more specific details regarding the findings of the initial MR cerebral angiography) as part of the ischemic stroke work-up for recurrent episodes of right hemiparesis and expressive aphasia.