Latest

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 6

Learn which blood tests and clinical checks are used to monitor APS, including antibodies, INR, heparin safety, clotting risk, pregnancy surveillance, and follow-up timing.

APS Monitoring Blood Test Panel: Antibodies, Clotting Risk, Pregnancy Risk, and...

Learn what a beta-2 glycoprotein 1 IgA antibody result means, why it is a non-criteria APS marker, and how isolated or persistent positivity may relate to clot risk.

Beta-2 Glycoprotein 1 IgA Antibody Test: APS Risk and Antiphospholipid Antibodies

Learn how beta-2 glycoprotein 1 IgG testing supports APS diagnosis, how levels and persistent results affect clot risk, and what the test may mean after pregnancy loss.

Beta-2 Glycoprotein 1 IgG Antibody Test: APS, Clotting Risk, and Pregnancy...

Understand what a beta-2 glycoprotein 1 IgM antibody result means, how it relates to APS, clotting and pregnancy loss, and why repeat testing matters.

Beta-2 Glycoprotein 1 IgM Antibody Test: APS, Clotting Risk, and Pregnancy...

Learn how the dRVVT test screens for lupus anticoagulant, how screen-mix-confirm results are interpreted, and why anticoagulants can distort the result.

Dilute Russell Viper Venom Time (dRVVT) Test: Lupus Anticoagulant Screening and...

Learn how the hexagonal phospholipid neutralization test confirms lupus anticoagulant, what the delta clotting time means, and which drugs can interfere.

Hexagonal Phospholipid Neutralization Test: Lupus Anticoagulant Confirmation and Meaning

Understand how a lupus anticoagulant reflex panel uses screening, mixing, and confirmation tests, how to read the report, and why medication can interfere.

Lupus Anticoagulant Reflex Panel: Screening, Mixing Study, Confirmation, and Interpretation

Learn what positive, negative, and indeterminate lupus anticoagulant tests mean, how they relate to clotting risk and APS, and why repeat testing matters.

Lupus Anticoagulant Test: Positive, Negative, Clotting Risk, and APS Meaning

Learn what a phosphatidylserine-prothrombin antibody test measures, how IgG and IgM results relate to APS and clotting risk, and why context and repeat testing matter.

Phosphatidylserine-Prothrombin Antibody Test: APS Risk, Clotting Risk, and Meaning

Understand what the PTT-LA test screens for, why a prolonged result is not diagnostic, how mixing and confirmation work, and what the result may mean for lupus anticoagulant and APS.

PTT-LA Test: Lupus Anticoagulant Screening, Prolonged Clotting Time, and Meaning

Learn which APS markers are included in recurrent pregnancy loss testing, how positive and negative patterns are interpreted, why 12-week confirmation matters, and how results may guide a future pregnancy.

Recurrent Pregnancy Loss Antiphospholipid Panel: APS Markers, Miscarriage Risk, and Meaning

Learn what a seronegative APS test panel may include, why non-criteria antibodies require cautious interpretation, and how specialists evaluate APS-like symptoms when standard markers are negative.

Seronegative Antiphospholipid Syndrome Test Panel: Non-Criteria Antibodies and APS-Like Symptoms

Learn what a thrombosis antiphospholipid panel measures, when APS testing is useful after a clot, how anticoagulants affect results, and what single, double, or triple positivity may mean.

Thrombosis Antiphospholipid Panel: Clotting Risk, APS Markers, and Meaning

Triple-Positive Antiphospholipid Antibody Panel: High-Risk APS, Clotting Risk, and Meaning

Learn when to draw an acute tryptase test, how to compare it with baseline using the 20% plus 2 rule, and why a normal result does not exclude anaphylaxis.

Acute Tryptase Test: Anaphylaxis, Mast Cell Activation, Timing, and Interpretation

Understand what an allergy blood test panel measures, how total and specific IgE differ, why positive results may not equal allergy, and when focused follow-up is needed.

Allergy Blood Test Panel: Total IgE, Specific IgE, Allergen Triggers, and...

Learn how the alpha-gal IgE test helps diagnose delayed red-meat allergy after tick bites, what positive and negative results mean, and how to manage exposure safely.

Alpha-Gal IgE Test: Red Meat Allergy, Tick Bite, Delayed Reaction, and...

Learn how a baseline tryptase test is collected and interpreted, including reference ranges, hereditary alpha-tryptasemia, mastocytosis criteria, and appropriate follow-up.

Baseline Tryptase Test: Mastocytosis, Mast Cell Burden, Hereditary Alpha-Tryptasemia, and Meaning

Learn how the basophil activation test uses CD63 and CD203c to assess functional allergy, how results are interpreted, and why BAT cannot precisely predict future reaction severity.

Basophil Activation Test: Allergy Testing, CD63, CD203c, and Reaction Risk

Learn which blood tests are useful for chronic urticaria, how total IgE, tryptase, anti-TPO antibodies, and autoimmune markers are interpreted, and when broader testing is needed.

Chronic Urticaria Blood Test Panel: IgE, Tryptase, Thyroid Antibodies, and Autoimmune...

1...567...74 Page 6 of 74