Von Willebrand disease is typically diagnosed after which event?

• A. Excessive bleeding from a surgery or tooth extraction
• B. Late adolescence only
• C. A normal bleeding history
• D. After dental prophylaxis

Answer: (A)

The pattern here is that von Willebrand disease often doesn’t show up until the hemostatic system is stressed by a procedure. Von Willebrand factor helps platelets adhere to the damaged vessel and stabilizes factor VIII, so when it's deficient or dysfunctional, bleeding after minor trauma or surgery becomes excessive. That’s why an excessive bleed following a dental extraction or similar surgery is the classic event that brings this disorder to light.

Seeing it after a routine dental cleaning is less typical because prophylaxis usually causes only minor bleeding. Also, the condition isn’t limited to a single age window like late adolescence; it can be diagnosed at various ages depending on when a triggering procedure or significant bleeding occurs. A normal bleeding history wouldn’t usually prompt suspicion, since the abnormality often emerges when a procedure reveals impaired hemostasis.