Left sided colitis affects (from the bottom up) the rectum, sigmoid and all or part of the left side of the colon. Yours has now extended across the top of the upside-down U shape of your colon, but not into the right side, which connects with the small intestine.
Ulcerative colitis forum co-moderator
Moderate to severe left-sided UC diagnosed 2001.
Flared for 5 years, finally in remission with Remicade since March 2006.
Avascular necrosis in both shoulders is my "forever" gift from steroids.
Colazal, Remicade, Nature's Way Primadophilus Reuteri.
"My life is an ongoing medical adventure"