Vaz, A.Eusébio, MartaAntunes, A.Queiros, P.Gago, T.Belo, T.Caldeira, PauloGuerreiro, H.2017-04-072017-04-072016-071873-9946http://hdl.handle.net/10400.1/9583Ulcerative colitis (UC) is a chronic inflammatory disease in which clinical course varies substantially between patients. The extent of the disease is usually pointed out as one of the factors responsible for this variation. With this study, we pretended to evaluate the differences in natural history and pharmacological therapy prescription between left-sided and extended UC.engjournal article