结肠冗长症是一种先天性结肠畸形，是结肠在发育过程中因基因再复制而生长过长所致。主要表现为腹痛、腹胀和长期顽固性便秘。X线钡剂灌肠造影是诊断结肠冗长症的主要手段。如果升、横、降结肠或乙状结肠的任何一段长度超过标准长度的35%～40%，即可诊断为结肠冗长症。具有长期顽固性便秘者，非手术治疗无效者，可行外科手术治疗，并且多数学者主张行扩大范围的切除。

Redundant colon is a kind of congenital disease of colon.The main manifestations are abdominal pain, abdominal distension and intractable constipation.X-ray barium enema is the main method for the diagnosis of redundant colon.If one part of the ascending, transverse, descending or sigmoid colon exceeds 35%~40% of standard length, it can be diagnosed as redundant colon.With long-term persistent constipation, or non-operative treatment is invalid, surgical treatment is feasible.Most scholars believe that the expansion resection is appropriate.