Diverticulitis is an acute inflammation of the diverticular bearing portion of colon, caused by microscopic or macroscopic perforation of one or more diverticula. An inflammatory reaction develops primarily involving the colonic wall and surrounding pericolonic tissue. For patients with a microperforation or uncomplicated diverticulitis, the inflammatory reaction is self-limited and confined, and without the development of an abscess or peritonitis. For patients with a macroperforation or complicated diverticulitis, complications of the inflammatory reaction can include fecal and/or purulent peritonitis, abscess, enteric fistula, and/or stricture formation.
This topic review will focus on the management of patients with acute diverticulitis. Epidemiology, pathophysiology, and clinical manifestations are reviewed elsewhere:
●(See "Colonic diverticulosis and diverticular disease: Epidemiology, risk factors, and pathogenesis".)
●(See "Clinical manifestations and diagnosis of acute diverticulitis in adults".)
●(See "Diverticular colitis".)