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Unilateral autoimmune orchitis with concurrent contralateral testicular atrophy in a two-year-old Newfoundland dog
  1. Callum George Donnelly,
  2. Soon Hon Cheong and
  3. Robert O Gilbert
  1. Department of Clinical Sciences, Theriogenology Section, Cornell University, College of Veterinary Medicine, Ithaca, New York, USA
  1. Correspondence to Dr Callum George Donnelly, cgd43{at}


A two-year-old, entire male Newfoundland dog was referred for suspected unilateral cryptorchidism. On examination the dog had two descended testicles, however, the right testis was markedly smaller than the left. Collected ejaculates were consistently azoospermic and leucospermic. The dog was castrated and the testes examined histologically revealing a lyphoplasmacytic orchitis in the left testis and fibrosis with evidence of vascular damage in the smaller right testis. These findings suggest sympathetic contralateral autoimmune testicular disease in the canine, a pathology not reported in the canine species until now.

  • Autoimmune disease
  • Dogs
  • Reproduction
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