Charles Louis Davis and Samuel Wesley Thompson DVM Foundation

For the Advancement of Veterinary and Comparative Pathology

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Image: F30210

Pathology Image
  • SPECIES:
    • BOVINE
  • SYSTEM:
    • ENDOCRINE
  • ORGAN:
    • PITUITARY
  • DIAGNOSIS:
    • PITUITARY ABSCESS
  • CAUSE:
    • TRUEPERELLA PYOGENES
  • CONTRIBUTOR:
    • O'TOOLE
  • INSTITUTION:
    • WYOMING STATE VETERINARY LABORATORY
  • GENPATH:
    • BACTERIA
  • COMMENTS:
    • The rich arterial and venous plexus (rete mirabile) surrounding the pituitary gland. Embolic bacteria tend to lodge at this site. The classic syndrome is in bulls after nose rings are inserted. In this instance, we isolated Trueperella pyogenes. This was a 4 year old cow, and we received only a head. Usually the abscesses are evident due to tenting of dura at the base of the brain. The dura overlying the pituitary in this animal was flat. I nearly missed it since the brain came in for rabies IFA testing only. It is useful to incise the dura over the pituitary in cattle with a neurological history, to see whether there is a pituitary-peripituitary abscess.