Members' NAVLE study guide

Canine Hiatal, Paraesophageal and Bowel Hernias

3,839 words 13 min read 3 figures Reviewed November 9, 2026

A hernia is a protrusion of an organ or tissue through an opening in the wall that normally contains it. For the gastrointestinal system the important ones are hernias through the esophageal hiatus (sliding and paraesophageal hiatal hernias) and hernias that can trap bowel: diaphragmatic, umbilical, inguinal, scrotal and perineal. Most are not emergencies, but a hernia that traps and strangulates stomach or intestine can quickly kill a dog, and recognizing that moment matters most.

Key facts

Hernia (hiatal, paraesophageal, bowel) at a glance
  • True hernia: a hernial ring (the defect), a sac (peritoneal lining) and contents.
  • Hiatal hernia: type I (sliding) is the most common; brachycephalic breeds are overrepresented and Chinese Shar-Peis are predisposed.
  • Classic presentation: a young brachycephalic dog with regurgitation, hypersalivation or vomiting that worsens with excitement or exercise, sometimes with aspiration pneumonia.
  • Bowel hernias: traumatic diaphragmatic hernia after a road accident; umbilical hernia in puppies; inguinal hernia in middle-aged small-breed bitches; perineal hernia in older intact males.
  • Emergency: an irreducible, painful hernia with vomiting or shock (strangulation), a stomach that bloats in the thorax, or a bladder trapped in a perineal hernia.
  • Zoonotic or reportable: no.

What's inside

12 sections in the full guide
  1. Key facts
  2. How the NAVLE tests this
  3. Cause and pathophysiology
  4. Clinical signs
  5. Diagnosis
  6. Differential diagnoses
  7. Treatment and management
  8. Prevention, control and public health
  9. Prognosis
  10. Quick review
  11. Test yourself
  12. References
The full guide also has 3 tables, 3 figures, 3 self-test questions and 31 references, available to NAVLE members.

Read the full study guide

The full guide is part of every NAVLE plan, with diagnosis and treatment tables, figures, a quick review and self-test questions. Start a free trial to try the question bank, or log in if you are already a member.

Read the free overview article A shorter, free article on Hernia (hiatal, paraesophageal, bowel) on the NavleExam blog.

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