Table 3.
Stage | |
1 | Tumor confined to bowel wall, outer muscle intact |
2 | Tumor occupies muscle coat but does not enter intersphincteric plane |
3 | Tumor enters intersphincteric space or lies within within 1 mm of levator muscle |
4 | Invades external anal sphincter or is 1 mm or beyond levator with/without adjacent organ involvement |