Changes

T2W* '''No residual tumour mass'''* On T2-weighted MRI, * '''Complete response''': a normalised, two-layered rectal wall after CRT is suggestive of a complete response* On T2* '''Complete or near-weighted MRI, complete response''': a completely hypointense residue (fibroticwall thickening) residue without an clear residual isointense mass indicates a complete * '''Residual tumour mass''' (and/or nearfocal high sinal on DWI)** yT-stage: yT1-complete response2** yT3*** yT3a or yT3b (≤5 mm extramural growth)*** yT3c or yT3d (>5 mm extramural growth)**yT4, based on growth into: * Distance from the anorectal junction to the lower pole of the tumour (in cm)* Tumour length (in cm) *Sphincter invasionFor low tumours with sphincter invasion, describe: Depth of invasion* invades only the internal sphincter muscle* also involves the intersphincteric plane* also involves the external sphincter Height of invasion* involves only the proximal 1/3 of the complex/anal canal* also involves the middle 1/3 of the complex/anal canal* also involves the lower 1/3 of the complex/anal canal* involves pelvic floor (levator)