Figure 2.

Pre- (left 2 columns) and post-operative (right 2 columns) magnetic resonance T1 contrast coronal (a, c, e, g, i, k, m, o) and T2 axial fluid attenuated inversion recovery (b, d, f, h, j, l, n, p) imaging of four examples of olfactory groove meningiomas completely resected through an endoscopic endonasal approaches. Control imaging was performed on average at 6 months after surgery and confirmed either absence of new signal changes or near total resolution of preoperative signal changes