Von Willebrand Disease Type III, Type III vWD

Blood

Von Willebrand Disease (vWD) is a type of coagulopathy, a disorder of blood clotting. vWD is characterized into three types based on clinical severity, serum levels of vWF, and vWF multimer composition. Dogs with Type III vWD have markedly reduced to absent vWF levels with severe clinical signs.

  • Signs and symptoms

    Affected dogs bruise easily and excessively bleed from small wounds. Affected puppies may bleed excessively from their mouth when teething.

    This disease is typically diagnosed in puppies or young adults when they are spayed or neutered and have a problem with clotting. However, it can be diagnosed at any age.

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  • Diagnosis

    vWD is diagnosed through genetic testing and blood testing at a laboratory. Veterinarians may also nick a dog’s lip with a sterile needle and time how long it takes for clotting to occur.

  • Treatment

    vWD cannot be treated, only managed. Preventing injuries is goal number one. If your dog requires surgery, your veterinarian should be warned that excessive bleeding may occur and blood products need to be on hand in case a transfusion is required.

  • What to do if your dog is at risk

    Actions

    • Prevention is key! Minimizing the risk of trauma and informing your veterinarian so that surgeries can be carefully planned are the best ways to prevent a catastrophic outcome.
    • Be aware of the location of the nearest emergency veterinary hospital in case of an accident.

  • Genetic Information

    This mutation was first identified in Scottish Terriers.

    vWD Type III is inherited in an autosomal recessive manner, meaning that affected dogs must have two copies of the mutation to show clinical signs.

    Gene names:

    VWF Exon 4 ‐ chr

    Inheritance type:

    recessive

  • Breeds affected

    This health condition affects the following breeds

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