Fig. 3.

MRI coronal T2-w (A) showing homogeneous hyperintensity into the aneurysmal sac (arrow) without flow void signs, due to reduced blood flow or partial thrombosis; coronal T1-w after gadolinium with fat suppression (B) revealing an enlargement of the left CS with a convex lateral wall (arrow 1), a filling defect of its superior portion (arrow 2) and an enhancement of the surrounding meninges (arrow 3); 3-dimensional time-of-flight images (C) showing an irregular and narrow appearance of the cavernous and ophthalmic tract of the ICA (arrow); axial T2-w (D) revealing mild signs of left sphenoid sinus mucosal thickening.