Rectal ca, located at the entrance of the rectum, large enough to block stool and become mets with 3 months sx's - fast growing or slow growing?

Bx of histo needed: Lesion as you describe is anal in origin and frequently squamous Ca. Bx needed. If anal canal to rectum blocked RT plus chemo needed. If truly rectal adenoCa, RT chemo may be needed to shrink lesion but surgery, APR would be needed Can't predict slow or fast growing but at this size pelvic nodes may be involved and CT of pelvis can clarify. Should be seen by team with surgeon, RT and chemo.