Living with T.T.P: Can it come back?

Was dx with T.T.P in 2014, by God's grace i was hospitalized For something unrelated when it surfaced. My platelets were 10,000. They did not expect me to survive. I believe I had 17 plasma farissa's treatments It's never resurfaced II get my blood checked about every 6 months my question is is is this something that stays in remission and could come back or is it once they get it in remission it never comes back I don't know a whole lot about it