No. Colitis is inflammation of the colon (often used to describe inflammation of the whole large intestine - colon, rectum and cecum), which can be caused by a variety of things - for example Crohn's...
The rate of remission of ulcerative colitis (after a first attack) is nearly 90%. Those individuals whose colitis is confined primarily to the left side of the large intestine have the best prognosis.
perforation of the intestine (in which the wall of the intestine develops a hole), toxic dilation of the colon (in which the colon become quite large in diameter), and the development of colon cancer.