Figure 1From: Sigmoid colon cancer arising in a diverticulum of the colon with involvement of the urinary bladder: a case report and review of the literature Enhanced MRI T1-weighted image. Between the sigmoid colon and the urinary bladder, the solid tumor was connected via the fistula, showing a dumbbell-shaped appearance. The sigmoid colon tumor protruded into the urinary bladder lumen (arrows) via the colovescal fistula (arrowheads).Back to article page