Question: What causes Protein C deficiency ?
Answer: What causes protein C deficiency? Protein C deficiency can be inherited or acquired later in life. Inherited protein C deficiency is caused by mutations in the gene that provides instructions for making protein C, called the PROC gene. These mutations disrupt the protein's ability to control blood clotting. If protein C cannot control blood clotting, abnormal blood clots may form. Acquired protein C deficiency may be caused by large blood clots, liver disease, disseminated intravascular coagulation (DIC), infection (sepsis), and vitamin K deficiency. Treatment with warfarin or certain types of chemotherapy can also cause acquired protein C deficiency.
Source: GARD

Question: Is Protein C deficiency inherited ?
Answer: How is protein C deficiency inherited? Hereditary protein C deficiency is inherited in an autosomal dominant manner. This means that having only one mutated copy of the responsible gene in each cell is enough to cause mild protein C deficiency. A mutated copy of the gene can be inherited from a person's mother or father. People who inherit two mutated copies of the gene have severe protein C deficiency.
Source: GARD