Diverticulosis of the appendix, as a rare and incident disorder, mimics acute or chronic appendicitis and is characterized by herniation of the appendiceal mucosa through the muscular wall. Symptom and laboratory data of diverticular disease usually represent chronic inflammation. In this study, a 43-year-old female with a history of right lower quadrant pain and anorexia represented abdominal tenderness and rebound tenderness in the physical examination and normal laboratory tests. Abdominal

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... nography did not show any evidence of acute appendicitis. The removed appendix was 12 cm in length and had multiple diverticular protrusions along with it. The histologic examination showed diverticulosis without evidence of inflammation. The patient was discharged two days later in optimal clinical condition. Diverticulosis of the appendix often is confused with acute or chronic appendicitis based on similar presenting symptoms and imaging studies. Although surgery is the definitive treatment of both conditions, an appropriate diagnosis of diverticular disease before surgery is very important because of the association of appendiceal diverticular disease with neoplasm and other complications.