Hemophilia A results from a missing or deficient clotting factor VIII, while Hemophilia B results from a missing or deficient clotting factor IX.
Notes on verification
Confirmed by multiple authoritative medical sources including CDC, MedlinePlus, and MSD Manual, consistent with established medical consensus.
Sources
- Random Bruising: 13 Possible Causes Excluding Obvious Injury (healthline.com)
- https://www.cdc.gov/hemophilia/testing/how-hemophilia-is-inherited.html (cdc.gov)
- https://www.medlineplus.gov/genetics/condition/hemophilia/ (medlineplus.gov)
- https://www.msdmanuals.com/professional/hematology-and-oncology/coagulation-disorders/hemophilia (msdmanuals.com)