For military purposes (i.e., as unfitting), or for VA purposes?
Seems to me that if there are no duty limitations/functional impact and it was benign, it is unlikely to be found unfitting. And at a 0% rating, it would not make a difference for your military rating. So, seems to make little difference if it was found unfitting or not (except, if you wanted to play out permutations with a TDRL finding for later possible increased ratings if there is a recurrence/development into malignancy later).
However, generally, I tend to favor claiming anything that is supported and plausible so long as there is no downside to doing so.
If you mean for VA purposes, unless a "referred" condition, they will look at it until you are out and have achieved Veterans status. At that point, I would definitely seek to have it added as an additional claim.