von Willebrand disease Type I (vWD I)
Von Willebrand disease (vWD) is probably the most common inherited bleeding disorder in dogs. It is caused by lack of von Willebrand factor which is a protein that plays a key role in the blood clotting process resulting in prolonged bleeding. The disorder occurs in varying degrees of severity ranging from trivial bleeding to excessive life threatening haemorrhages.
Symptoms include spontaneous bleeding from the nose, gum and other mucous membranes. Excessive bleeding occurs after an injury, trauma or a surgery. Often dogs don’t show clinical signs until something starts the bleeding, such as nail trimming, teething, spaying, sterilizing, tail docking, cropping or other causes. Bleeding also occurs internally in the stomach, intestines, urinary tracts, the genitals and / or into the joints.
Type I von Willebrand's disease is considered relatively mild.