A 14-year-old girl presents with prolonged bleeding after dental surgery. What is the likely diagnosis?

The scenario described involves a 14-year-old girl experiencing prolonged bleeding following dental surgery, which is a critical context in evaluating her condition. Von Willebrand's disease is a common inherited bleeding disorder characterized by a deficiency or dysfunction of von Willebrand factor (vWF), which is crucial for platelet adhesion during the formation of a clot. This condition often manifests as easy bruising, frequent nosebleeds, and prolonged bleeding after injuries or surgical procedures, such as dental work.

In dental procedures, where significant vascular injury can occur, patients with von Willebrand's disease often experience more significant bleeding than expected. Unlike other coagulation disorders, individuals with von Willebrand's have normal platelet counts but have platelets that do not function optimally due to the lack of effective von Willebrand factor. This is particularly pertinent in children and adolescents who may present with such bleeding events in seemingly routine situations.

While hemophilia B and other conditions listed can also present with bleeding, they usually have different clinical features, such as a more predictable bleeding pattern associated with deeper tissues rather than superficial sites like gums. Iron deficiency anemia and chronic myelogenous leukemia would not typically cause primary bleeding issues directly corresponding to dental surgery. Therefore, the combination of prolonged bleeding following a minor surgical