Fig. 1

Contrast-enhanced computed tomography (CT), magnetic resonance imaging (MRI), and positron emission tomography/computed tomography findings. a Computed tomography (CT) revealing a tumor measuring 77 mm in diameter in the posterior wall of the urinary bladder (white arrow: urinary bladder), with heterogeneous enhancement in the solid part and an enhancing hypodense lesion. b Sagittal CT showing the tumor located between the posterior wall of the bladder and rectum. c MRI revealing a large tumor between the posterior wall of the bladder and rectum; the tumor is heterogeneous and partly hyperintense on a T2-weighted image. d Sagittal contrast-enhanced MRI showing an indistinct border between the tumor and posterior wall of the bladder, with the rectum compressed dorsally