A patient with a history of easy bruising and prolonged bleeding after trauma is found to have a deficiency of which clotting factor?

A Factor XIII ✓
B Factor VII
C Factor XII
D Factor IX

Explanation

Factor XIII, also known as fibrin stabilizing factor, is essential for cross-linking fibrin molecules to form a stable clot. A deficiency in factor XIII can lead to easy bruising and prolonged bleeding after trauma.

Source

Williams Hematology
Hematology Hematology: Coagulation Disorders Hematology: Coagulation Disorders Hard MEDICAL Confidence: high