November 2025 QQ: Stuart-Prower Factor

Our November 2025 Quick Question tests our historical knowledge. Not long ago, we learned about various names for the coagulation factors; e. g., proaccelerin, proconvertin, and plasma thromboplastin antecedent. Some factor names were proper nouns, for example, Hageman factor, Fletcher factor, and Fitzgerald factor. This month’s question asks you to identify the Stuart-Prower factor by its Roman numeral. Hint, look in your dusty reference library for Corriveau, D. Plasma Proteins: Factors of the Hemostatic Mechanism in Corriveau DM, Fritsma GA. Hemostasis and Thrombosis in the Clinical Laboratory, Lippincott, 1988. If you are feeling intellectual, tell how some of these factors got their original names.