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Complications include abscess formation, perforation, sepsis, fistulas, and colonic stenosis, which may be present at initial presentation or develop during the disease course. Approximately 10%\u201320% of hospitalized diverticulitis cases are classified as complicated. Over recent decades, the management of this condition has undergone a paradigm shift\u2014from routine surgical intervention to more individualized, evidence-based strategies emphasizing conservative treatment where appropriate. This review provides a comprehensive, clinically oriented summary of current diagnostic approaches, including the role of cross-sectional imaging, as well as non-operative and operative treatment options. 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