Fig. 3 Contrast-enhanced MRI. a, T2WI showed high signal. b, enhancement showed slight enhancement in the periphery of the lesion and no significant enhancement in the interior. c, DWI showed high signal. d, ADC showed high signal.
Finally, the patient underwent transanal endoscopic resection of rectal mass, and the postoperative pathology was as follows: multiple mucous lakes could be seen in the rectal intestinal wall, locally covered by intestinal epithelium, no atypia, and the laminar propria interstitials could be seen, which was consistent with CCP (Figure 4).