Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Protein C deficiency ?
    ### Response:
    Protein C deficiency is a disorder that increases a person's risk to develop abnormal blood clots. The condition can be mild or severe. People with mild protein C deficiency are at risk for a type of clot called deep vein thrombosis (DVT). A DVT can travel through the bloodstream and become stuck in the lung, which can cause a life-threatening pulmonary embolism.
    