CT - D2 after the initial ...
D2 after the initial presentation
Follow up noncontrast head CT shows the evolution of infarcts in right PCA and superior cerebellar artery territories (superior surface of the right cerebellum hemisphere and vermis, right occipital and medial temporal lobes, right thalamus) and acute infarcts in left PCA territory (left thalamus and occipital lobe hypodense areas ) with new hyperdensity inside left P1 fusiform aneurysm.
The hyperdensity in basilar tip aneurysm is more prominent in this examination compared with the previous.
CT angiography confirms the presence of thrombus inside basilar tip fusiform aneurysm with extension to the left P1 segment-most clearly demonstrated on coronal reconstruction.