I find it interesting that your drs. say that juvenile polyps do not reoccure.
My son has been scoped since he was 2 yrs. old and he recently turned 8. I noticed his first polyp when I was changing his diapers. The colonoscopys started immediately.
He had three more that were removed his first visit in 1997.
We went back the following year in anticipation of them reoccuring. Sure enough they did.
We go back yearly to have them removed. To date he has had 11 removed