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| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Complement Component C4c
Message| Interfaced |
Test Code
C4
Quest Code
353
Preferred Specimen
1 mL serum
Minimum Volume
0.5 mL
Transport Container
Transport tube
Transport Temperature
Refrigerated (cold packs)
Specimen Stability
Room temperature: Unacceptable
Refrigerated: 8 days
Frozen: 21 days
Refrigerated: 8 days
Frozen: 21 days
Methodology
Immunoturbidimetric
Setup Schedule
Mon-fri
Report Available
2 days
Reference Range
| Male | Female | |
| <1 Year | Not established | Not established |
| 1-14 Years | 14-44 mg/dL | 13-46 mg/dL |
| 15-80 Years | 15-53 mg/dL | 15-57 mg/dL |
| ≥81 Years | Not established | Not established |
Clinical Significance
Decreased C4 level is associated with acute systemic lupus erythematosis, glomerulonephritis, immune complex disease, cryoglobulinemia, congenital C4 deficiency and generalized autoimmune disease.
Performing Laboratory
| Quest Diagnostics-Pittsburgh Lab |
| 875 Greentree Road |
| Pittsburgh, PA 15220-3508 |
