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Aetiology

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Adult pyloric stenosis occurs most commonly as a result of peptic ulceration, where at first fibrotic scarring is compensated by dilatation and hypertrophy of the stomach muscle. The process of compensation eventually fails to keep pace - similar to the failure of a hypertrophic ventricle to pump through a stenosed valve. This sort of obstruction is not specific to the pylorus.

Other causes of pyloric stenois include:

  • tumour, e.g. cancer of the stomach, commonly, carcinoma of the antrum; rarely, Hodgkin's disease
  • vagotomy, used in the treatment of intractable gastric ulceration. A pyloroplasty is performed in an effort to prevent this.

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