PMC4418170_01
GBM and pseudoaneurysm. Pretreatment T1-weighted gadolinium-enhanced axial MRI demonstrating a heterogeneously enhancing mass in the right frontotemporal region extending into the right basal ganglia and internal capsule in 2005 (a). Posttreatment T1-weighted, gadolinium-enhanced coronal MRI of a cystic and nodular heterogeneously enhancing frontotemporal lesion extending from the middle fossa floor to the right basal ganglia in 2011 (b). Oblique AP (c) and oblique lateral (d) projections of a right internal carotid artery injection during a digital subtraction angiogram revealing the presence of a 2 cm, rapidly filling aneurysm with extremely irregular walls and no identifiable neck arising from the region of the right MCA trifurcation later in 2011
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A magnetic resonance imaging (MRI) of the brain demonstrated a heterogeneously enhancing mass in the right frontotemporal region extending into the right basal ganglia and internal capsule [Figure 1a]. Several years later, progressive enhancement was discovered on routine surveillance imaging and the patient underwent reresection [Figure 1b]. The angiogram displayed a 2 cm, rapidly filling aneurysm with extremely irregular walls and no identifiable neck arising from the region of the right MCA trifurcation [Figure 1c and d].