Figure 1From: Perineal approach for a gastrointestinal stromal tumor on the anterior wall of the lower rectumColonoscopy and a T2 sagittal magnetic resonance image showed a mass on the anterior wall of the rectum. (a) Colonoscopy disclosed a bulge which probably originated in the submucosal layer. (b) A T2 sagittal magnetic resonance image demonstrated a mass on the anterior wall of the rectum without any invasion to the prostate (arrow).Back to article page