C1 Esterase Inhibitor


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Alternative Names

C1 inhibiting factor


Normal Values

C1 esterase inhibitor: 16 to 33 mg/dl (160 to 330 mg/L)

Note: mg/dl = milligrams per deciliter


What abnormal results mean

Increased complement activity may be seen in:

Decreased complement activity may be seen in:



Review Date: 04/20/2005
Reviewed By: Stanford Peng, M.D., Ph.D., Division of Rheumatology, Washington University School of Medicine, St. Louis, MO. Review provided by VeriMed Healthcare Network.


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