D68.03

Clinical Causes: Inheritance of faulty genes from parents, as VWD type 3 is a genetic disorder. Mutations in the VWF gene, leading to defects in producing von Willebrand factor. Autosomal recessive inheritance pattern, meaning both copies of the gene must be affected for the disease to manifest. Family history of similar bleeding issues typical of inherited bleeding disorders.

Key Symptoms: Frequent and prolonged bleeding episodes, especially after injuries or surgeries. Spontaneous bleeding without obvious cause, such as nosebleeds, bleeding gums, or hematuria (blood in urine). Excessive bruising even with minor trauma. Heavy menstrual bleeding in women and girls. Bleeding into joints or muscles in severe cases, though less common in Type 3.

Diagnosis Path: Diagnosis of VWD type 3 involves a combination of medical history, physical examination, and laboratory tests. Key steps include: - Blood tests to measure the quantity and function of von Willebrand factor. - Low or absent levels of VWF confirm the diagnosis. - Additional tests like factor VIII activity measurement, since VWF carries factor VIII. - Family genetic testing may be considered to confirm inherited patterns.

Treatment Protocols: Managing VWD type 3 focuses on preventing and controlling bleeding episodes. Common approaches include: - Replacement therapy with von Willebrand factor concentrates, administered intravenously during bleeding episodes or prophylactically. - Desmopressin (DDAVP), which can temporarily increase VWF levels, is usually ineffective in Type 3 because of the near absence of VWF. - Use of antifibrinolytic agents like tranexamic acid for minor bleeding or to prevent bleeding during dental procedures. - Education for patients on avoiding injury and recognizing bleeding symptoms promptly. - Regular follow-up with hematology specialists to tailor treatment plans and monitor disease progression.