Megarectum is a large
rectum as a result of underlying
nerve supply abnormalities or
muscle dysfunction, which remains after disimpaction of the rectum. [citation needed]
The Principles of Surgery textbook describes any rectum that can hold more than 1500cc of fluid as a megarectum. The term megarectum is also used for a large rectal mass on
rectal examination, a wide rectum on an
abdominal x-ray, the presence of impaired rectal sensation or the finding of large maximal rectal volumes on
anorectal manometry. In addition, can be the bloating of the colon due to infection, also called
megacolon. [citation needed]
On
defecography, megarectum is suggested by a rectal width of >9 cm at the level of the distal
sacrum.[1]
References
^Smith, Lee E.; Blatchford, Garnet J. (2007). "Physiologic Testing". In Wolff, Bruce G.; Fleshman, James W.; Beck, David E. (eds.). ASCRS textbook of colon and rectal surgery. New York: Springer. p. 50.
ISBN978-0-387-24846-2.