C1 Esterase Inhibitor

Injury	Disease	Nutrition	Poison

Symptoms	Surgery	Test	Special Topic

Overview

Risks

Results

C1 Esterase Inhibitor

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:

cancer
ulcerative colitis

Decreased complement activity may be seen in:

hereditary angioedema
bacterial infections (especially Neisseria)
cirrhosis
glomerulonephritis
hepatitis
lupus nephritis
malnutrition
kidney transplant rejection
systemic lupus erythematosus

Review Date: 4/20/2005
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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