克隆氏病(Crohn’s disease,CD)除了有其本身的特殊表现外,临床上常以并发症出现,极易造成假象而延误诊断,故本文对其并发症作一综述。瘘管形成瘘管乃是CD特征性和最常见的并发症,也是本病和溃疡性结肠炎的重要区别点,其发生率约为26～48%。过去报道以外瘘为主,内瘘发生率仅在9～20%。1975年Greens-tein Crohn’s disease (CD) in addition to its own special performance, the clinical often appear as complications, can easily cause the illusion and delay diagnosis, so this article reviews its complications. Fistula formation Fistula is the most common CD features and complications, but also the disease and ulcerative colitis important distinction, the incidence of about 26 ~ 48%. In the past reported mainly outside the fistula, the incidence of fistula only 9 ~ 20%. 1975 Greens-tein