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Peer-reviewed veterinary case report

Congenital Type III von Willebrand's disease unmasked by hypothyroidism in a Shetland sheepdog.

Journal:
The Canadian veterinary journal = La revue veterinaire canadienne
Year:
2015
Authors:
Scuderi, Margaret et al.
Affiliation:
Department of Pathology (Burgess) · Canada
Species:
dog

Abstract

A 7-year-old, spayed female Shetland sheepdog had sudden onset of right-sided epistaxis. Diagnostic tests revealed Type III von Willebrand's disease and primary hypothyroidism leading to an acute hypothyroid crisis and acquired factor VIII (FVIII) deficiency. Levothyroxine therapy normalized the serum thyroxine and FVIII concentrations. The delayed onset of disease and the reversible FVIII deficiency that was corrected with levothyroxine therapy, support a role for hypothyroidism in the pathogenesis of this dog's sudden bleeding tendency as has been seen with hypothyroidism in humans.

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Original publication: https://pubmed.ncbi.nlm.nih.gov/26347307/