Fig. 7 Contrast-enhanced MRI. a, T2WI showed high signal intensity and
multiple low signal separations. b, separate enhancement was presented
in the lesion. C,DWI showed high signal (low signal area was
calcification). d,ADC showed high signal without any decrease.
Colonoscopy: A size of 20 mm × 18mm protuberant mass was seen on the
anterior wall about 4cm from the anal verge, with superficial ulcer on
the surface. Endoscopic resection of rectal submucosal mass was
performed, and the submucosal incision showed gelatinous appearance
(Figure 8). Postoperative pathology: colitis cystica profunda of the
rectum with calcification (Figure 9).