Ulcerative colitis is not only a disease of young people, it can start in a high age. In old age, diverticular disease of the sigmoideum is quite common, and sometimes colonoscopy reveales two diseases. This old lady in her ninth decade got bloody diarrhea and anaemia. This colonoscopy picture taken in the distal descendent colon shows diverticular disease.

In this picture 45 cm from the anus, the mucosa gets red and fragile.

And this picture from the middle of the sigmoid colon shows both diverticulas (but no diverticulitis!) and a mucosal change typical of ulcerative colitis.

So this old lady has a diverticular disease (probably for decades) and a concommittant ulcerative colitis. Probably there are no association between these two diseases. A few months later, all the symtoms were gone after and during treatment with sulfasalazin.