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* Mecanical obstruction  
 
* Mecanical obstruction  
An obstrucion of the colon or rectum will cause faecal material to become impacted and dry. The obstruction may be intraluminal such as a foreign body
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An obstrucion of the colon or rectum will cause faecal material to become impacted and dry. The obstruction may be intraluminal such as a foreign body, polyp, mass or stricture. Extraluminal obstruction can be due to a mass, abscess, and prostatic disease such as prostatic cyst, mass and prostamegaly.
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Chronic cases may progress to Obstipation, the faeces become so hard and dry that defecation is no longer possible and ultimately there is secondary degeneration of the colonic musculature.
 
Chronic cases may progress to Obstipation, the faeces become so hard and dry that defecation is no longer possible and ultimately there is secondary degeneration of the colonic musculature.
  
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