C4 level

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
• Q
• R
• S
• T
• U
• V
• W
• X

C4

• Males: 12 to 72 mg/dl (120 to 720 mg/L)
• Females: 13 to 75 mg/dl (130 to 750 mg/L)

Increased complement activity may be seen in:

• Cancer
• Ulcerative colitis

• Hereditary angioedema
• Bacterial infections (especially Neisseria)
• Cirrhosis
• Glomerulonephritis
• Hepatitis
• Lupus nephritis
• Malnutrition
• Kidney transplant rejection
• Systemic lupus erythematosus

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.