Please note, you mentioned that Scully had cancer which was cured by CSM. That never happened though. It would appear you were referring to the "Duane Barry" arc, specifically her being in a coma in episode "One Breath", where she mysteriously recovered and CSM tells Mulder that he "returned" her to him. In other words, Scully was in sick and in a coma in season two, but she did not have cancer.