• Patrick Téoule, Laffolie Jan de J, Udo Rolle, and Christoph Reissfelder.
• Department of Surgery, Universitäts -medizin Mannheim, Medical Faculty Mannheim, Heidelberg UniversityDepartment of General Pediatrics and Neonatology, Pediatric Gastroenterology, University of Giessen, GermanyDepartment of Pediatric Surgery, University Hospital Frankfurt, Goethe-University Frankfurt am Main, Frankfurt, Germany.
• Dtsch Arztebl Int. 2020 Nov 6; 117 (45): 764-774.

BackgroundAcute appendicitis is the most common cause of the acute abdomen, with an incidence of 1 per 1000 persons per year. It is one of the main differential diagnoses of unclear abdominal conditions.MethodsThis review is based on pertinent publications that were retrieved by a selective search in the PubMed and Cochrane Library databases.ResultsIn addition to the medical history, physical examination and laboratory tests, abdominal ultrasonography should be performed to establish the diagnosis (and sometimes computed tomography [CT] or magnetic resonance imaging [MRI], if ultrasonography is insufficient). Before any treatment is provided, appendicitis is classified as either uncomplicated or complicated. In both types of appendicitis, the decision to treat surgically or conservatively must be based on the overall clinical picture and the patient's risk factors. Appendectomy is the treatment of choice for acute appendicitis in all age groups. In Germany, appendectomy is mainly performed laparoscopically in patients with low morbidity. Uncomplicated appendicitis can, alternatively, be treated conservatively under certain circumstances. A meta-analysis of five randomized, controlled trials has revealed that ca. 37% of adult patients treated conservatively undergo appendectomy within one year. Complicated appendicitis is a serious disease; it can also potentially be treated conservatively (with antibiotics, with or without placement of a drain) as an alternative to surgical treatment.ConclusionConservative treatment is being performed more frequently, but the current state of the evidence does not justify a change of the standard therapy from surgery to conservative treatment.

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