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Hypernatraemia in a young German shepherd dog with a middle fossa mass
  1. Emma K Mapletoft,
  2. Julien Bazelle and
  3. Andrew T Parry
  1. Willows Referral Service, Highlands Road, Shirley, Solihull, West Midlands, B90 4NH
  1. Correspondence to Emma K Mapletoft, emma.mapletoft{at}


A 10-month-old female entire German shepherd dog presented with inappetence, pyrexia and weight loss. It had marked hypernatraemia, which did not fully resolve despite receiving hypotonic intravenous fluid therapy. Physical examination showed signs of dehydration but no neurological deficits. MRI of the brain identified a well-demarcated mass in the middle fossa, involving the thalamus, the optic chiasm and the pituitary gland. It is likely that thalamic involvement led to hypodipsia and subsequent hypernatraemia.

  • Hypernatraemia
  • Pyrexia
  • Hypothalamus
  • Brain diseases
  • Central nervous system (CNS)
  • Diagnostic imaging
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