Fig. 2
From: MRI anatomy of the rectum: key concepts important for rectal cancer staging and treatment planning
Examples showing the normal two-layered (a) versus oedematous three-layered (b) appearance of the rectal wall on axial T2-weighted MRI and the corresponding cross-sectional wall anatomy at histopathology (c). Figure d shows an example of a 63-year-old male rectal cancer patient with a polypoid tumour staged as cT1-2 considering that the submucosa is not separately visible, making it impossible to determine whether this tumour invades the submucosa (T1) or infiltrates the muscularis propria (T2)