Figure 2From: Endoscopically observable white nodule caused by distal intramural lymphatic spread of rectal cancer: a case report A Primary tumor located 15 cm from the anal verge at preoperative colonoscopy. B Small nodules existed on the anal side of the main tumor and irregular mucosal surface associated with intramural spread of cancer. C Narrow band imaging of small nodules. D Endoscopic examination with indigo carmine. Back to article page