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September 7, 1929, Vol 93, No. 10 >
ARTICLE | September 7, 1929

THE MOBILE RIGHT COLON

W. R. HOUSTON, M.D.
JAMA. 1929;93(10):766-768. doi:10.1001/jama.1929.02710100028011.
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ABSTRACT

In 20 per cent of persons there occurs, as the result of a fault in embryologic development, an absence of fixation of the ascending colon to the posterior abdominal wall. This absence of fixation may concern the entire right colon or may be limited to the pendulous cecum. The mobility of the right colon is often very great. When examined under the screen, the vertical excursion of the hepatic flexure as between the upright and the recumbent postures may be as much as 6 or 7 inches. It is often possible to push the whole of the right colon over to the left of the spine. Instead of being fixed, the right colon is found to possess a mesentery of varying length and, in addition to the true mesentery, there usually develops a backward continuation and elongation of it, the pseudomesentery, a firm dense structure coming from the fascia of

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