<prompt> True about ulcerative colitis are all except20 end up in colectomy.The highest risk of UC requiring surgery is in 1st year.Extra intestinal problems of UC are managed medicallySteroid dependent cases needs surgery.  <response>: Ref. Sabiston Textbook of Surgery. Pg. 1340Extraintestinal manifestations of ulcerative colitis respond to colectomy except Primary sclerosing cholangitis . 