• Samuel Andreas Käser, Niels Willi, and Christoph Andreas Maurer.
• Department of General, Visceral, Vascular and Thoracic Surgery, Hospital of Liestal, Liestal, Switzerland.
• J. Int. Med. Res. 2013 Aug 1; 41 (4): 1350-6.

ObjectiveThe epidemiology and the aetiology of inflammatory diseases of the vermiform appendix remain poorly understood. The prevalence of appendiceal diverticulosis and diverticulitis in patients undergoing appendectomy for suspected acute appendicitis was investigated.MethodsA retrospective study was completed on patients who underwent appendectomy for suspected acute appendicitis. Pathology reports of all patients were screened for diverticula of the vermiform appendix. Patients with either diverticulitis of the vermiform appendix or normal appendicitis were compared.ResultsOut of two sets of consecutive patients (n = 1073), nine (0.8%) were identified with diverticulosis of the vermiform appendix. Two of these patients had diverticulitis of the vermiform appendix without appendicitis, three had diverticulitis with consecutive localized appendicitis, and four had proper acute appendicitis with a noninflamed diverticulum of the vermiform appendix. One patient had perforated appendicitis. Two patients had an obstructing neuroendocrine carcinoid which may have caused diverticular formation.ConclusionsDiverticula of the vermiform appendix are rare. If inflamed, they mimic acute appendicitis and are treated by appendectomy. If not inflamed, and diagnosed intraoperatively, incidental appendectomy is recommended.

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