PMC5586820_01
The hyperdense PCA sign. A = Anterior; P = posterior; R = right; L = left. a Noncontrast CT scan showing the hyperdense PCA sign (arrow) extending up to the basilar artery, suggestive of acute occlusion of the left PCA and basilar artery. b Magnetic resonance imaging (diffuse weighted image) showing an area of restricted diffusion, suggestive of acute infarction in the left medial temporal lobe (arrowhead) and occipital lobe (arrow), both supplied by the PCA.
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F1
However, there was evidence of a 'hyperdense left PCA' (fig. 1a), suggestive of a thromboembolic process in the left PCA. Follow-up magnetic resonance imaging was performed after intra-arterial thrombolysis (fig. 1b) which showed an area of acute infarction in the medial temporal and occipital region corresponding to the area supplied by the left PCA.