SII is a powerful prognostic marker in oncology, cardiovascular disease, and critical illness. It integrates information about inflammation (neutrophils), immune response (lymphocytes), and thrombotic potential (platelets). Higher SII values indicate worse prognosis across multiple disease states.
SII is a powerful prognostic marker in oncology, cardiovascular disease, and critical illness. It integrates information about inflammation (neutrophils), immune response (lymphocytes), and thrombotic potential (platelets). Higher SII values indicate worse prognosis across multiple disease states.
The Systemic Immune-Inflammation Index (SII) combines platelet, neutrophil, and lymphocyte counts to provide a comprehensive assessment of immune-inflammatory status.
High Systemic Immune-Inflammation Index (SII) levels above the standard range may indicate an underlying health condition that warrants further evaluation.
Low Systemic Immune-Inflammation Index (SII) levels below the standard range may indicate an underlying health condition that warrants further evaluation.
The Systemic Immune-Inflammation Index (SII) combines platelet, neutrophil, and lymphocyte counts to provide a comprehensive assessment of immune-inflammatory status.
Normal and optimal Systemic Immune-Inflammation Index (SII) ranges can vary by sex, age, and lab methodology. Review your result with a qualified clinician for personalized interpretation.
SII is a powerful prognostic marker in oncology, cardiovascular disease, and critical illness. It integrates information about inflammation (neutrophils), immune response (lymphocytes), and thrombotic potential (platelets). Higher SII values indicate worse prognosis across multiple disease states.
Elevated SII: No direct symptoms, but associated with fatigue, poor recovery, and symptoms of underlying inflammatory or malignant conditions.
High SII: Cancer, severe infections, autoimmune diseases, cardiovascular disease, trauma, surgical stress. Lower SII: Generally indicates healthy immune-inflammatory balance.
Systemic Immune-Inflammation Index (SII) can be ordered through Vitals Vault without a doctor referral, then completed at CLIA-certified Quest Diagnostics locations nationwide. After checkout, you receive clear draw instructions, digital requisition details, and a structured report that explains whether your result is in standard range, optimal range, or needs follow-up review.
Start by identifying the root cause, then use targeted nutrition, training, sleep, stress, and follow-up retesting to verify improvement. Systemic Immune-Inflammation Index (SII) should be optimized with a personalized plan, not guesswork.
You should speak with a clinician if Systemic Immune-Inflammation Index (SII) is significantly outside the reference range, trending in the wrong direction across repeat tests, or accompanied by symptoms like fatigue, chest discomfort, dizziness, weight change, or persistent inflammation signs. Immediate medical care is important for severe symptoms, not just abnormal numbers in isolation.
A practical retesting cadence for Systemic Immune-Inflammation Index (SII) is every 8 to 12 weeks after major lifestyle, nutrition, or medication changes, and every 3 to 6 months for stable long-term tracking. Faster cadence is useful when values are clearly abnormal, while maintenance cadence helps confirm durability once results stabilize.
You can compare Essential ($99), Advanced ($199), and Max ($399) plans during checkout to confirm Systemic Immune-Inflammation Index (SII) inclusion before purchasing. If Systemic Immune-Inflammation Index (SII) is not in your selected tier, you can upgrade plans or add targeted testing so your panel matches your goals, symptoms, and retesting strategy.
Systemic Immune-Inflammation Index (SII) is included in our comprehensive biomarker panels, processed at CLIA-certified Quest Diagnostics locations nationwide.
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Medical Disclaimer: This content is for educational and informational purposes only. It is not intended as medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with any questions about a medical condition or treatment. Do not disregard professional medical advice or delay seeking it because of information presented here.