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Serum Amyloid A

SAA Serum Amyloid A Protein
Serum (SST) mg/L

About this test

Acute-phase protein that rises rapidly and to a greater degree than CRP in severe systemic inflammation. Chronic sustained elevation leads to AA amyloidosis (amyloid A) in joints and kidneys.

Reference Ranges

Sex Age Range Notes
All ≥ 18 yrs < 10 Normal <10 mg/L; rises markedly (up to 1000×) in severe inflammation

Clinical Interpretation

High / Increased
Bacterial infection, severe systemic inflammation, rheumatological disease, post-surgery, trauma. Sustained elevation — risk of AA amyloidosis (FMF, RA, JIA, IBD, chronic infection).
Specimen
Serum (SST)
Reporting Unit
mg/L
Category
🌡️ Inflammation

⚠ Clinical Note
Reference ranges are indicative. Always interpret results in the context of the individual patient and local laboratory reference intervals, which may vary.