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Figure 1: Axial T2-weighted MRI showed heterogeneous signal intensity (SI) lesion in relation to right ICA bifurcation region (arrow in a) and right cingulate gyrus suggestive of aneurysm (arrow). Mild surrounding perilesional edema (b and c). SWI showed blooming in the right cingulate gyrus (d). Follow up MRI after 1 year 10 months showed significant interval increase in size of DACA aneurysm with significant interval increase in perilesional edema (e–g). SWI showed interval increase in the heterogeneous SI of the aneurysm suggestive of partial thrombosis (h)

Figure 1: Axial T2-weighted MRI showed heterogeneous signal intensity (SI) lesion in relation to right ICA bifurcation region (arrow in a) and right cingulate gyrus suggestive of aneurysm (arrow). Mild surrounding perilesional edema (b and c). SWI showed blooming in the right cingulate gyrus (d). Follow up MRI after 1 year 10 months showed significant interval increase in size of DACA aneurysm with significant interval increase in perilesional edema (e–g). SWI showed interval increase in the heterogeneous SI of the aneurysm suggestive of partial thrombosis (h)