Normal Reference Ranges
Adult
< 10 (Standard) | < 1 (High-Sensitivity) mg/L
Pediatric
< 10 mg/L
Clinical Significance
Acute phase reactant synthesized by the liver. Extremely sensitive but non-specific marker for systemic inflammation.
Causes of High
- Bacterial infection
- Rheumatoid arthritis
- Lupus flare
- Myocardial infarction
- Malignancy
Causes of Low
- Normal finding