(a) Computed tomography (CT) angiogram showing intraluminal thrombus
located completely within a right fetal posterior cerebral artery
(FPCA) (asterisk). (b) CT perfusion scan showing elevated mean
transit time involving the posterior right frontal, right temporal,
right parietal, and right occipital lobes. (c) Digital subtraction
angiogram (DSA) of cervical right internal carotid artery showing
severe stenosis with concomitant intraluminal thrombus. (d), (e) DSA
in frontal and lateral views showing patency of traditional anterior
circulation, with acute occlusion of FPCA (double arrows). (f)
Lateral view in late arterial phase showing intralumal thrombus in
FPCA with delayed opacification of P3 segments (dashed arrows). (g)
Follow-up magnetic resonance image showing moderate infarct of the
right thalamus and occipital lobe, with (h) coronal T2 sequence
showing patent recanalization of the FPCA. Note the absence of
ipsilateral P1 segment.