I will give my experience. I had left-sided UC for maybe 7 years, mostly in one spot. Then the next scope I had, it was all in my rectum. It has stayed there for 5 years and did not spread.
Diagnosed with Left-sided Ulcerative Colitis 1995 at 15
Tried: Prednisone, Rowasa & Hydrocortisone Enemas, Proctofoam, Sulfasalazine, Asacol, Probiotics, Fish Oil, Canasa, Enotcort, Colazol, Proctocort, Anamantle, etc...
Diagnosed with Ulcerative Proctitis with almost rectovaginal fistula in 2004, put on Remicade, August 2007:Increased Remicade dosage-700mg every 6 weeks,diagnosed with Psoriatic Arthritis & Fibromyalgia Current meds:
Remicade 700mgs every 6 wks (had reaction, will start Humira Jan 29) Clorazepate, Proctofoam HC, Glucosamine 500, Vitamin B, Lomotil as needed, Darvocet, Tylenol pm