Surgical and medical treatment in patients with acute severe ulcerative colitis. 
Ulcerative colitis (UC) is a chronic inflammatory disease of the mucosa of the colorectum.  The treatment of UC depends on the severity of symptoms and the extent of the disease.  Acute severe colitis (ASC) occurs in 12-25% of patients with UC.  Patients with ASC must be managed by a multidisciplinary team.  Medically or surgically aggressive treatment is carried out with the final aim of reducing mortality.  Intravenous administration of corticosteroids is the mainstay of the therapy.  Medical rescue therapy based on cyclosporine or infliximab should be considered if there is no response to corticosteroids for 3 days.  If there has been no response to medical rescue therapy after 4-7 days, the patient must undergo colectomy in emergency surgery.  Prolonged observation is counterproductive, as over time it increases the risk of toxic megacolon and perforation, with a very high mortality rate.  The best potential treatment is subtotal colectomy with ileostomy and preservation of the rectum.  Emergency surgery in UC should not be seen as a last chance, but can be considered as a life-saving procedure.  Colectomies in emergency setting are characterized by high morbidity rates but the mortality is low.