The incidence of IBD in Copenhagen increased noticeably during the last decades. Time from onset of symptoms until diagnosis decreased markedly, extent of CD was related to age at diagnosis, and the risk of surgery was low in UC.
Although the overall risk of EIC was not significantly increased among patients with IBD, the risk of individual cancer types differed from that of the background population as well as between CD and UC patients. These findings may primarily be explained by smoking habits, extra-intestinal manifestations of IBD, and involvement of the upper gastrointestinal tract in CD.
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