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After medical treatment of the first episode, the incidence of complications was highest for young patients with CT\u2010graded severe diverticulitis and lowest for older patients with CT\u2010graded moderate diverticulitis. Recurrence in the form of diffuse peritonitis was rare. CT grading of initial diverticulitis seemed to be a predictor of recurrence, whereas the role of age was less clear. A family history of diverticulitis might be predictive of recurrence.<\/jats:p><jats:p><jats:bold>Conclusion\u2002<\/jats:bold> CT grading of acute diverticulitis helps to predict poor outcome after medical treatment of a first episode. Elective surgical resection should be proposed to patients with residual symptoms who do not respond to conservative treatment. Additional research is needed to clarify the role of a genetic predisposition in the development of diverticulitis in young adults.<\/jats:p>","DOI":"10.1111\/j.1463-1318.2012.03026.x","type":"journal-article","created":{"date-parts":[[2012,3,8]],"date-time":"2012-03-08T17:32:03Z","timestamp":1331227923000},"update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Sigmoid diverticulitis in 2011: many questions; few 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