Archive Case #124: Canine Myasthenia Gravis

Clinical Clues

1. A young adult dog has episodes of weakness that change with activity.
2. The weakness worsens after exertion and improves after rest.
3. The owner reports frequent regurgitation shortly after eating.
4. Thoracic imaging reveals a gas- and fluid-filled dilated esophagus.
5. Testing supports an acquired disorder of neuromuscular transmission.
6. Canine myasthenia gravis commonly causes exercise-induced weakness and secondary megaesophagus.

Diagnosis

Canine Myasthenia Gravis

This case is most consistent with Canine Myasthenia Gravis because the dog has fatigable weakness together with regurgitation and megaoesophagus. The most important clues are the exercise-related weakness and neuromuscular pattern, which make a primary orthopaedic disorder less likely.

Educational Use

Vetdle archive cases are educational veterinary games for diagnostic reasoning practice. They do not provide veterinary advice, diagnosis, treatment, or professional medical guidance.