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Postanesthetic death in a cat with myopathy
G Remmers1, D W Hayden2, M A Jaeger3
1Department of Veterinary Population Medicine, Minnesota Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Minnesota, St Paul, MN, USA Genevieve-remmers@idexx.com.
Veterinary Pathology
|March 1, 2014
Summary
A rare muscular dystrophy case in a domestic cat showed a complete absence of dystrophin protein, confirming Duchenne muscular dystrophy. This finding highlights the risk of anesthetic complications in affected felines.
Area of Science:
- Veterinary Pathology
- Animal Genetics
- Comparative Myology
Background:
- Naturally occurring muscular dystrophy is infrequently reported in domestic animals.
- Duchenne muscular dystrophy (DMD) is a severe genetic disorder characterized by progressive muscle degeneration.
Observation:
- A 4-year-old domestic shorthair cat experienced unexpected death post-anesthesia.
- Macroscopic examination revealed muscular hypertrophy, while histology showed myofiber abnormalities, mineralization, degeneration, necrosis, and endomysial fibrosis in the diaphragm.
Findings:
- Western blot analysis confirmed a complete absence of dystrophin protein.
- Immunofluorescence microscopy indicated reduced dystrophin-associated proteins and increased utrophin at the sarcolemma.
- These findings are consistent with Duchenne muscular dystrophy.
Implications:
- Anesthetic deaths in cats may be linked to undiagnosed muscular dystrophy.
- Muscular dystrophy and associated cardiomyopathy should be considered in the differential diagnosis for perianesthetic deaths in cats.
- This case underscores the importance of recognizing genetic muscle disorders in veterinary anesthesia.
