Diverticulosis & Diverticulitis Make an Appointment Patient Education Find a Doctor Download Patient Education The colon is the lower portion of the GI tract and is about 5 feet long. Diverticulosis is a disease that occurs in the colon. Diverticula are small pockets that form in the wall of the colon. Diverticulosis means the presence of diverticula in the colon. Download PDF: Diverticulosis & Diverticulitis Download PDF: Diverticulosis & Diverticulitis View more information on Diverticulosis & Diverticulitis National Jewish Health authors free downloadable patient education materials to provide you and your family the information and tools to help manage your disease. They include Understanding Booklets, Med Facts, Test Facts, Medication handouts and more. Search Free Education Materials