The general surgeon is probably called on to operate in the right lower quadrant of the abdomen more frequently than in any other region and here preponderantly for inflammatory lesions of the vermiform appendix. It is my purpose in this paper to call attention to a condition closely resembling appendicitis, a condition which is seldom considered in the differential diagnosis and one which is scarcely mentioned in any of the standard textbooks of surgery. In discussing a series of 118 cases of diverticulitis of the colon, Judd and Pollock1made no mention of cecal diverticulitis simulating appendicitis. Solitary cecal diverticulitis should not be confused with multiple diverticulitis, which may involve the cecum and ascending colon— examples of this condition having occurred from time to time in the surgical service of Johns Hopkins Hospital. Instances of solitary cecal diverticulitis have been reported in the literature from time to time and