The lead pipe appearance of colon is the classical barium enema finding in chronic ulcerative colitis, and is also seen with other modalities such as CT or MRI. There is a complete loss of the haustral markings in the diseased segment of the colon, appearing smooth-walled and cylindrical.
This appearance results from an increased mucosal regeneration, which in turns lead to muscularis mucosae hypertrophy. When this enlarged muscular layer contracts, it gives the appearance of lead pipe colon 2.
- 1. Gore RM, Balthazar EJ, Ghahremani GG et-al. CT features of ulcerative colitis and Crohn's disease. AJR Am J Roentgenol. 1996;167 (1): 3-15. AJR Am J Roentgenol (citation) - Pubmed citation
- 2- Baldwin M, Genant J, Braver J et-al. Part 2: Classic signs in gastrointestinal radiology. Appl Radiol. February 07, 2012 https://appliedradiology.com/articles/part-2-classic-signs-in-gastrointestinal-radiology.aspx