Fig. 1. (A and B) Head CT on admission; there were low-density areas in left cerebellum and left occital-temporal lobe. (C and D) Diffusion-weighted-image on head MRI revealed high-intensity areas. (E) Basilar tip or left PCA occlusion was suspected on MRA. (F) After sudden unconsciousness, incomplete BAO was revealed on CTA. BAO: basilar artery occlusion, CT: computed tomography, CTA: computed tomography angiography, MRA: magnetic resonance angiography, MRI: magnetic resonance imaging, PCA: posterior cerebral artery, SCA: superior cerebellar artery.
