Polyp More Condition_treatment Doctor Called My Dad After Biopsy Of His Polyp. He Wants My Dad To Come In For A Procedure. What Does He Mean?

Doctor called my dad after biopsy of his polyp. He wants my dad to come in for a procedure. What does he mean? - polyp more condition_treatment

I wonder why no doctor to remove the polyp completely on its first session, during a colonoscopy. Now that the biopsy results are found, they want to get my father in an instance. Does this mean that a bad thing?
Another question: How bad can it be a removal of polyps? Has she been in bed for a few days?