Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) factor V Leiden thrombophilia ?
    ### Response:
    Factor V Leiden thrombophilia is an inherited disorder of blood clotting. Factor V Leiden is the name of a specific gene mutation that results in thrombophilia, which is an increased tendency to form abnormal blood clots that can block blood vessels.  People with factor V Leiden thrombophilia have a higher than average risk of developing a type of blood clot called a deep venous thrombosis (DVT).
    