I once had an almost ten year full, med-free remission from extensive pancolitis, and I have heard others with simple proctitis who never get a remission at all, so extent of disease and severity or flaring are two different things, i think. However, I do assume that long term prognosis e.g. the chances of eventual surgery etc. are highest for pancolitis.
Pancolitis ~20 years, once had a full med-free 10 year remission,
but flaring/simmering on and off for years, allergic to all 5ASAs
12.5ish mg pred,
100 mg Imuran TCM
Probiotics (PD, Cust.Probiot., Culturelle, VSL3, etc), DMSO,
Turmeric/circumin, boswellia, fish oil, many vits/minerals
Lower-carb version of Specific Carb Diet (SCD), Remicade