Charles Louis Davis and Samuel Wesley Thompson DVM Foundation

For the Advancement of Veterinary and Comparative Pathology

info@cldavis.org | Phone: 847-367-4359 | Fax: 847-247-1869

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Pathology Image
  • SPECIES:
    • CANINE
  • SYSTEM:
    • MUSCLE
  • ORGAN:
    • SKELETAL MUSCLE
  • DIAGNOSIS:
    • EXTRACOCULAR MYOSITIS
  • CONTRIBUTOR:
    • WILLIAMS
  • INSTITUTION:
    • Armed Forces Institute of Pathology
  • GENPATH:
    • IMMUNE DYSFUNCTION
  • COMMENTS:
    • This uncommon disease of dogs results from lymphocytic infiltration of extraocular muscles (except the retractor bulbi), seen here as the whitish discoloration of muscle bundles. The condition is most commonly seen in young dogs and Golden retrievers are overrepresented. Clinically, dogs demonstrate bilateral exophthalmos, but without pain, visual deficits, or prorusion of the third eyelid. The cause of this condition is unknown.