True about ulcerative colitis are all except
Ref. Sabiston Textbook of Surgery. Pg. 1340
Extraintestinal manifestations of ulcerative colitis respond to colectomy except Primary sclerosing cholangitis .
20% end up in colectomy.
The highest risk of UC requiring surgery is in 1st year.
Extra intestinal problems of UC are managed medically
Steroid dependent cases needs surgery.