“…As a consequence, however, without CT-scan or operation, no classification of diverticulitis for the vast majority of patients exists, because the hitherto used classifications (Hinchey, Hansen-Stock) were based on either operative or CT-criteria. On the other hand, merely ´clinical diagnosis´ of diverticulitis is insufficient (sensitivity ~65%) and potentially misleading [4,[37][38][39][40]. Also apostrophized as ´left sided appendicitis´, the triad (i) spontaneous pain in the left lower quadrant, exaggerated by movements, (ii) an inflammatory reaction (CRP, WBC, temperature) and (iii) local guarding upon palpation, is unspecific, time-dependent, and variable, and thus may raise the suspicion of diverticulitis but neither satisfies contemporary diagnostic needs nor excludes most differential diagnoses [4,29].…”