Internal Sphincter Dysfunction: A Cause of Idiopathic Megacolon

  • R. H. S. Lane
Conference paper


Constipation is defined as the infrequent and incomplete passage of faeces per rectum. Megacolon is an uncommon condition in which the bowel is persistently of increased diameter, and is always associated with long-standing constipation (Todd 1961). Two main groups are recognised according to whether or not ganglia are present in the inter- muscular plane of the rectal wall. Their complete absence, even along a short segment of rectum, denotes Hirschsprung’s disease. If ganglia are present the dilated bowel may be secondary to some predisposing factor (Todd 1961), or there may be no apparent organic reason as to why the bowel should be so dilated. This latter condition is termed idiopathic megacolon (Lane and Todd 1977).


Chronic Constipation Internal Sphincter Rectal Distension Dilate Bowel Rectal Pressure 
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Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • R. H. S. Lane

There are no affiliations available

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