No differences were found in the maximum diameter of the pituitary tumor between LHRH responders and nonresponders [tumor diameter, 13.9 mm (IQR 11.3 to 19.4) vs. 14.9 mm (IQR 10.2 to 23.0), P = 0.64; Table 2]. Here, GNRH1 is linked to pituitary tumor.