Figure 1

Neuroradiological examination. (A) A hematoma was observed in the left hippocampus, extending to the parahippocampal gyrus in a brain CT scan on admission. (B) Cerebral angiography before (left) and after (right) coil embolization. An irregular dissecting aneurysm was found in the distal portion of the left posterior cerebral artery. Dissection had occurred in the main trunk of the posterior cerebral artery, and it was formed due to a portion that extended saccular and a portion that extended in fusiform, where the portion that extended in saccular was embolized, and the main trunk was preserved. (C) A hematoma was found in the left hippocampus extending to the parahippocampal gyrus in MRI scan on day 10 after the onset. (D) A decline in cerebral blood flow in the left medial temporal lobe was found in SPECT images on day 14 after the onset.