Fig. 2From: Surgical outcome of non-functioning pituitary adenomas: a comparative study between microscopic and endoscopic techniquesA coronal contrasted T1-weighted MR image for a pre-operative tumor with a volume 5.56 cc, Knosp grade 3 (left) that was reduced to 0.44 cc (right) after endoscopic resection (92% volume reduction)Back to article page