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Learn how HLA-DR and CD38 flow cytometry measures activated T cells, what high results may mean, why ranges vary, and how clinicians plan follow-up.

Activated T-Cell Marker Test: HLA-DR, CD38, Immune Activation, and Inflammation

Understand how CD19 and CD20 B-cell counts are measured, why results may be high or low, how anti-CD20 therapy affects them, and which follow-up tests assess antibody function.

B-Cell Count Test: CD19, CD20, Immune Function, and Antibody Production

Learn what a CD4 count measures, how HIV affects helper T cells, what common ranges and thresholds mean, why results fluctuate, and how the test guides monitoring and infection prevention.

CD4 Count Test: Helper T Cells, Immune Function, HIV Monitoring, and Meaning

Learn how the CD4/CD8 ratio is calculated, what low or high results may mean, why an inverted ratio is nonspecific, and how the test adds context in HIV and immune monitoring.

CD4/CD8 Ratio Test: Immune Balance, High and Low Ratio, and Meaning

Learn what a CD8 count measures, why cytotoxic T-cell numbers may rise or fall, how viral infections affect results, and why cell quantity does not equal antiviral function.

CD8 Count Test: Cytotoxic T Cells, Immune Function, and Viral Response

Understand what a chemokine panel measures, why immune-signaling and cell-migration markers rise or fall, and how specialists interpret patterns and limitations.

Chemokine Panel Test: Immune Signaling, Inflammation, and Cell Migration Markers

Diagnostics

Home Diagnostics Page 45

Learn what the LP-IR score measures, the normal 0–100 range, what high results mean, how it relates to insulin resistance and diabetes risk, and what to do next.

LP-IR Score Test: Lipoprotein Insulin Resistance Score, Normal Range, Diabetes Risk,...

Learn what the Lp-PLA2 test measures, what high Lp-PLA2 may mean for vascular inflammation, stroke risk, and heart risk, and how results fit with cholesterol, ApoB, and cardiovascular prevention.

Lp-PLA2 Test: High Lp-PLA2, Vascular Inflammation, Stroke Risk, and Heart Risk

Learn what the myeloperoxidase MPO test measures, what high MPO means, common MPO ranges, artery inflammation links, plaque risk, causes, and follow-up steps.

Myeloperoxidase (MPO) Test: High MPO, Artery Inflammation, Plaque Risk, and Heart...

NMR Lipoprotein Profile Test: LDL-P, HDL-P, Particle Size, Insulin Resistance, and...

Learn what non-HDL cholesterol measures, what high results mean, normal and high ranges, how it compares with LDL and ApoB, and how it affects heart risk.

Non-HDL Cholesterol Test: High Non-HDL, Normal Range, Atherogenic Cholesterol, and Heart...

Understand non-HDL cholesterol vs LDL cholesterol, including what each measures, how they are calculated, target ranges, high-triglyceride patterns, and heart risk meaning.

Non-HDL Cholesterol vs LDL Cholesterol: What Is the Difference?

Learn how the Omega-3 Index and triglycerides work together to clarify heart risk, metabolic health, high triglyceride causes, ranges, and follow-up steps.

Omega-3 Index and Triglycerides: Interpreting Heart and Metabolic Risk

Learn what the omega-3 index test measures, what low omega-3 levels mean, common target ranges, heart health links, preparation tips, and how to improve results.

Omega-3 Index Test: Low Omega-3 Levels, Normal Range, Heart Health, and...

Learn what the oxidized LDL test measures, what high OxLDL may mean, how normal ranges vary, and how OxLDL relates to artery inflammation and cardiovascular risk.

Oxidized LDL (OxLDL) Test: High OxLDL, Normal Range, Artery Inflammation, and...

Learn what a plant sterol blood test measures, how sitosterol and campesterol relate to cholesterol absorption, what high results may mean, and when to evaluate for sitosterolemia.

Plant Sterol Blood Test: Sitosterol, Campesterol, Cholesterol Absorption, and Results

Understand remnant cholesterol and triglycerides, how to calculate results, what high levels mean, and how they reveal residual heart risk beyond LDL cholesterol.

Remnant Cholesterol and Triglycerides: Interpreting Residual Heart Risk

Learn what a remnant cholesterol test measures, how to calculate it, what high remnant cholesterol means, common causes, normal ranges, and how it relates to triglyceride-rich particles and cardiovascular risk.

Remnant Cholesterol Test: High Remnant Cholesterol, Normal Range, Triglyceride-Rich Particles, and...

Learn what the RLP-C blood test measures, what high remnant-like particle cholesterol means, common causes, normal range guidance, heart risk, and follow-up steps.

Remnant-Like Particle Cholesterol (RLP-C) Test: High RLP-C, Normal Range, Remnant Particles,...

Understand the small dense LDL test, including high sdLDL, normal range, Pattern B, LDL particle size, cardiovascular risk, causes, preparation, and ways to improve results.

Small Dense LDL (sdLDL) Test: High sdLDL, Normal Range, Pattern B,...

Understand small dense LDL, Pattern B, triglycerides, insulin resistance, ApoB, and cardiovascular risk with practical guidance on test interpretation and follow-up.

Small Dense LDL and Triglycerides: Pattern B, Insulin Resistance, and Risk

Learn what the total cholesterol and HDL ratio means, how to calculate it, what high and low ratios suggest, and why LDL, non-HDL cholesterol, triglycerides, ApoB, and overall heart risk still matter.

Total Cholesterol and HDL Ratio: Interpreting Cholesterol Risk Without Overdoing It

Learn the normal, borderline, high, and optimal total cholesterol ranges, how to interpret your result, why LDL and non-HDL targets matter, and what to do next.

Total Cholesterol Test Normal and Optimal Range: Reference Values and Targets

Learn what the total cholesterol/HDL ratio means, how to calculate it, what normal and high results suggest, and how it fits with LDL, HDL, non-HDL cholesterol, and heart risk.

Total Cholesterol/HDL Ratio Test: Normal Range, High Ratio, Cholesterol Risk, and...

Learn what the triglyceride/HDL ratio means, how to calculate it, what high results suggest about insulin resistance, diabetes risk, heart risk, and follow-up testing.

Triglyceride/HDL Ratio Test: Insulin Resistance, Diabetes Risk, Heart Risk, and Results

High triglycerides with low HDL can signal insulin resistance, metabolic syndrome, fatty liver, and higher cardiovascular risk. Learn how to interpret triglycerides, HDL, and the TG/HDL ratio.

Triglycerides and HDL: Interpreting the Metabolic Risk Pattern

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