vascular hemophilia; vascular pseudohemophilia; von Willebrand disease; von Willebrand disorder; von Willebrand’s-Jurgens’ disease; von Willebrand-Jrgens. The activity of vWF in a patient with von Willebrand disease. Aktywość vWF u pacjenta z chorobą Willebranda. Fig. 4. The activity of vWF in a. Hereditary bleeding disorders, such as von Willebrand disease, may be one of the causes of Choroba von Willebranda u kobiet z krwotocznymi miesiaczkami.

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Related Bing Images Extra: The testing for vWD can be influenced by laboratory procedures. The prevalence of vWD is about one in individuals. Types 1 and 2 are inherited as autosomal dominant traits.

Von Willebrand’s Disease in Dogs

Retrieved 3 Qillebranda Type 3 is the most severe form of vWD homozygous for the defective gene and is characterized by complete absence of production of vWF. Desmopressin is a synthetic analog of the natural antidiuretic hormone vasopressin. The chance of procedural errors are typically greatest during the preanalytical phase during collecting storage and transportation of the specimen especially when the testing is contracted to an outside facility and the specimen is frozen and transported long distances.

Hematology and Oncology Chapters. They are usually inherited as an autosomal dominant willebrnda though rare kindreds are autosomal recessive.

Mice affected by vWD type 3 were produced by genetic engineering to obtain a small sized model for the human disease. The severity of the disease varies from dog to dog and is of most concern if a dog is injured or needs surgery.

Please review the contents of the article and cuoroba the appropriate references if you can.

Its overuse can lead to water retention and dilutional hyponatremia with consequent convulsion. Please help improve this article by adding citations to reliable sources. In more severe cases of type 1 vWD, genetic changes are common within the vWF gene and are highly penetrant. To increase the probability of a proper diagnosis, testing should be done at a facility with immediate on-site processing in a specialized coagulation laboratory.


It affects both male and female dogs equally, and while any dog can have vWD, there are several breeds that are at greater risk:. chooroba

Therefore, those pigs are valuable models for clinical and pharmacological research. Why is this so important? Unfortunately, vWD is a hereditary disease, so there is no prevention or cure. Content is updated monthly with systematic literature reviews and conferences. Von Willebrand factor is mainly active in conditions of high blood flow and shear stress.

In angiodysplasiaa form of telangiectasia of the colonshear stress is much higher than in average capillariesand the risk of bleeding is increased concomitantly. The clinical picture in pigs is most similar to that in humans with vWD type 3. The good news is, many dogs with vWD live a long vpn healthy life.

Although access to this website is not restricted, the information found here is intended for use by medical providers.

Results from a Canadian cohort study”. This has led to some vWD type chorobz patients being misdiagnosed as having hemophilia A. In dogs affected by type 1 vWD, the causal mutation was the same across all breeds and the same mutation was also detected in some human vWD type 1 patients.

Only small multimer units are detected in the circulation. The inheritance pattern of vWD type 3 is autosomal recessive, while the inheritance pattern of hemophilia A is X-linked recessive. Hypo- coagulability Thrombocytopenia Thrombocytopenic purpura: It can arise from failure to secrete vWF into the circulation or from vWF being cleared more quickly than normal.

von Willebrand’s disease – Wikidata

Symptoms vary depending on severity and disease type but may include prolonged bleeding time, deficiency of factor VIII, and impaired platelet adhesion. These images are a random sampling from a Bing search on the term “Von Willebrand Disease. The genetic causes of milder forms of low vWF are still under investigation, and these forms may not always be caused by an abnormal vWF gene. Since this time, the factor causing the long bleeding time was called the “von Willebrand factor” in honor of Erik Adolf von Willebrand.

Related Topics in Coagulopathy. This is a ” gain of function ” defect. VWD can also affect dogs, pigs, and mice. However, some individuals heterozygous for type 3 may be diagnosed of vWD type 1, indicating an intermediate inheritance in that cases. It affects both male and female dogs equally, and while any dog can have vWD, there are several breeds that are at greater risk: It’s important to carefully watch your dog for symptoms and to prevent unnecessary bumps and bruises to help keep her safe.


Desmopressin is contraindicated in vWD type 2b because of the risk of aggravated thrombocytopenia and thrombotic complications. The vWF antigen test is normal, indicating normal quantity of vWF.

Many patients are asymptomatic or may have mild symptoms and not have clearly impaired clottingwhich might suggest a bleeding disorder. Overview Platelets play a vital role in the blood-clotting process. Includes true von Willebrand disease with mutation at the VWF locus, as well as mimicking disorders with other mutations pseudo VWD and acquired von Willebrand syndrome.

This section with questionable factual accuracy needs more medical references for verification or relies too heavily on primary sources. If a dog has an injury or wound, the platelets help stop bleeding and speed up the healing process by clotting at the site of the injury. Normal levels do not exclude all forms of vWD, particularly type 2, which may only be revealed by investigating platelet interaction with subendothelium under flow, a highly specialized coagulation study not routinely performed in most medical laboratories.

Retrieved 4 April Furthermore, cases have been reported in cats, horses, cattle, and rabbits. Type 3 is inherited as autosomal recessive. For patients with vWD scheduled for surgery and cases of vWD disease complicated by clinically significant hemorrhage, human-derived medium purity factor VIII concentrates, which also contain von Willebrand factors, are available for prophylaxis and treatment.

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