A 2-year-old, castrated male, mixed-breed dog presented with a 1-month history of red eyes and intermittent vomiting and a 2-week history of polyuria and polydipsia.
Bilateral anterior uveitis and active chorioretinitis in the left eye were found on ophthalmic examination.
Complete blood counts demonstrated evidence of an increased red blood cell mass. Thoracic and abdominal radiographs, abdominal ultrasonography, and Doppler echocardiography were unremarkable.
Serum erythropoietin level was low-normal, consistent with a diagnosis of polycythemia vera. Resolution of all systemic and ocular signs occurred, and remission was achieved following phlebotomy and treatment with oral hydroxyurea.
Source: Heather E. Gray, Claire M. Weigand, Nancy B. Cottrill, A. Michelle Willis, DVM, Rhea V. Morgan (2003): Polycythemia Vera in a Dog Presenting With Uveitis. In: Journal of the American Animal
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