Fig. 1From: Prevention of ureteral injury during laparoscopic colorectal cancer surgery with horseshoe kidney using fluorescent ureteral catheters: a case reportPreoperative findings. a Colonoscopy revealed a type-2 tumor in the sigmoid colon. b A contrast-enhanced computed tomography revealed sigmoid colon cancer (white arrowhead). c A contrast-enema revealed sigmoid colon cancer (white arrowhead). d The isthmus of the horseshoe kidney (white arrowhead)Back to article page