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. 2020 Sep 3;11:100. doi: 10.1186/s13244-020-00890-7

Fig. 18.

Fig. 18

Two different patients with two different early rectal cancers are depicted in a and b. In a, a thin submucosal fat plane is observed between the intermediate signal intensity tumour and the tented muscularis propria. Tumour may therefore be staged as mrT1sm1/2. Pathology of the total mesorectal excision specimen revealed a pT1sm1; in b, the tumour abuts the inner circular layer of the muscularis propria and may therefore be staged as mrT1sm3/earlyT2. Pathology of the total mesorectal excision specimen revealed a pT1sm3