"Hematochezia, or bright red blood per rectum, is not a symptom of diverticulitis, although occult blood in the stool is present in approximately 25% of patients with diverticulitis. When hematochezia is noted, other causes (eg, hemorrhoids, neoplastic disease, colitis, vascular ectasias, arterial bleeding from diverticulosis) should be considered."
When you are talking about diverticular disease, if you see blood, it's diverticulosis. That is the way my GI prof. taught us to remember it for the GI module. Then if there is no blood, it's diverticulitis. So go with Robbins!!!!!