Fig. 6 Contrast-enhanced CT. a, Localized thickening and eminence of the
anterior wall of the lower rectum in plain scan, with visible
calcification. b-c,No significant enhancement was seen in the arterial
and venous phase.
CEMRI: An oval abnormal signal foci was seen in the submucosa of the
anterior wall of the lower segment of the rectum about 46 mm away from
the anal verge, with a size of 17 mm×18 mm×20 mm; T2WI showed high
signal and multiple low signal separations within it; No obvious limited
diffusion was observed on DWI and ADC images; separation enhancement was
observed on enhanced scan, and no clear enhancement was observed in the
remaining lesions; the boundary of the lesion was clear, and the outer
wall of the lesion was smooth (Figure 7).