Felis ISSN 2398-2950

Pyloric stenosis

Contributor(s): Andrew Gardiner, Joseph Harari

Introduction

  • Congenital or acquired hypertrophy of circular muscle fibers or hyperplasia of pyloric mucosa (or both) of pyloric ring of stomach.
  • Cause: may be associated with excess gastrin levels or abnormal neuro-muscular control.
  • Signs: vomiting food at variable intervals following feeding; esophagitis Esophagitis; aspiration pneumonia Pneumonia.
  • Diagnosis: no definitive test - suspect on clinical and contrast radiographic examination + gastroscopy.
  • Treatment: pyloroplasty or pyloromyotomy.
  • Prognosis: good.

Pathogenesis

Etiology

  • Congenital form: ?Excessive gastrin levels causing hypertrophy of circular muscle fibers.
  • ? Neuromuscular dysfunction.
  • Acquired: mucosal hypertrophy; extrinsic lesions (abscess, neoplasia) may mimic the condition.

Pathophysiology

  • Failure of pyloric ring to relax   →   vomiting of stomach contents.

Diagnosis

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Treatment

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Outcomes

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Walter M C & Matthiesen D T (1989) Gastric outflow surgical problems. Probl Vet Med (2), 196-214 PubMed.
  • Matthiesen D T & Walter M C (1985) Surgical treatment of chronic hypertrophic pyloric gastropathy in 45 dogs. JAAHA 22 (2), 241-247 VetMedResource.
  • Pearson H, Gaskell C J, Gibbs C et al (1974) Pyloric and oesophageal dysfunction in the cat. JSAP 15 (8), 487-501 PubMed.
  • Twaddle A A (1971) Congenital pyloric stenosis in two kittens corrected by pyloroplasty. N Z Vet J 19 (1-2), 26-27 PubMed.
  • Twaddle A A (1970) Pyloric stenosis in three cats and its correction by pyloroplasty. N Z Vet J 18 (1-2), 15-17 PubMed.


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