Indicator Explainer
C-Reactive Protein
C-reactive protein (224 aa, ~25 kDa) is encoded by the human CRP gene. This protein is cleaved during biological activation and is associated with host defense mechanisms and inflammatory responses.
This page explains what the indicator is and how results are interpreted in general terms. Reference ranges depend on the laboratory, the method, and your own situation — no single “normal value” applies to everyone. This page is health information, not a diagnosis. For symptoms, treatment, or urgent concerns, contact a healthcare professional.
When it is tested
Source: National Cancer Institute, NCI Thesaurus 26.09d, C60651. NCI definition, reproduced without modification under CC BY 4.0. Source identity and definition checked automatically on 2026-10-18. No individual clinical interpretation or human reviewer is asserted.
Reading results
Reference intervals and interpretation depend on the laboratory, specimen, method and clinical context. This source definition is educational information; it does not establish a diagnosis, product approval or suitability for an individual.
Also Known As
Related Tests
Tests that measure or involve this indicator.
References
- NCI Thesaurus 26.09d — C-Reactive Protein (C60651)
- Source: National Cancer Institute, NCI Thesaurus 26.09d, C60651. NCI definition, reproduced without modification under CC BY 4.0.
- Postoperative Day 2 C-reactive Protein Identifies Patients at Low Risk of Anastomotic Leakage After Colon Cancer Resection. — Ann Surg, 2026-10-09 (PMID 42850694; literature)
- Inflammation and specific symptoms of depression: cross-sectional sex-specific associations between C-reactive protein and symptoms of depression in the lifelines cohort study. — Brain Behav Immun, 2026-10-08 (PMID 42849765; literature)
- Index-window C-reactive protein and carcinoembryonic antigen and five-year all-cause mortality in Hispanic/Latino and non-Hispanic White patients with colorectal cancer: a retrospective biomarker cohort study. — Future Sci OA, 2026-10-08 (PMID 42848519; literature)
- High-sensitivity C-Reactive Protein as a Risk-Enhancing Biomarker in Patients with Chronic Kidney Disease and Atherosclerotic Cardiovascular Disease: A Narrative Review. — Cardiorenal Med, 2026-10-15 (PMID 42879335; literature)
- Associations of patient-reported outcome measures with impaired mobility and elevated C reactive protein in axial spondyloarthritis: a cross-sectional study. — RMD Open, 2026-10-14 (PMID 42875093; literature)
- Comparison of Inflammatory Markers in Peyronie's Disease: C-Reactive Protein, Neutrophil-to-Lymphocyte Ratio, and Inflammatory Burden Index. — Fr J Urol, 2026-10-22 (PMID 42914058; literature)
- Label‑Free Optical Biosensing of Interleukin‑6, Procalcitonin, and High-Sensitivity C-Reactive Protein as Inflammatory Biomarkers in Cardiovascular Disease: A Review. — Biotechnol Appl Biochem, 2026-10-28 (PMID 42949114; literature)
- Association of the ADAMTS14 rs4747096 Polymorphism and C-Reactive Protein Levels With Knee Osteoarthritis Severity: A Cross-Sectional Study. — Health Sci Rep, 2026-10-27 (PMID 42948182; literature)