How to treat an abscess caused by diverticulitis?

Three Options: A diverticular abscess is a collection of pus resulting from an acute perforation of the colon after a 'tic ruptures. If small, (IV) antibiotics alone may suffice. If it is bigger than an inch-or-two, drainage (plus abx) is required. Ideally, drainage is done by an interventional radiologist via ct-guidance; however, if the abscess cannot be accessed in this manner, surgical drainage is necessary.