Protein S deficiency; Protein C deficiency
Definition of Congenital protein C or S deficiency
Congenital protein C or S deficiency is a lack of proteins C or S in the fluid part of the blood. The proteins are natural substances that help prevent blood clots.
Causes, incidence, and risk factors
Congenital protein C or S deficiency is an inherited disorder, which means it is passed down through families. Congenital means it is present at birth.
If you have this condition, you are more likely to develop blood clots. The symptoms are the same as for deep venous thrombosis, and include:
Signs and tests
Laboratory tests will be done to check for proteins C and S. If you have this disorder, you will have a lack of protein C or S.
Blood-thinning drugs (heparin and warfarin) are used to treat and prevent blood clots.
The outcome is usually good with treatment, but symptoms may return.
David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine; James R. Mason, MD, Oncologist, Director, Blood and Marrow Transplantation Program and Stem Cell Processing Lab, Scripps Clinic, Torrey Pines, California. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc. – 3/28/2010