followup

(noun) a piece of work that exploits or builds on earlier work. Synonyms: follow-up. Example: "His new software is a follow-up to the programs they started with."

(noun) an activity that continues something that has already begun or that repeats something that has already been done. Synonyms: follow-up.

(noun) a subsequent examination of a patient for the purpose of monitoring earlier treatment. Synonyms: follow-up, reexamination, review.