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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 42

Learn what a high trypsinogen blood test can mean, including pancreatitis, pancreatic duct problems, chronic pancreas disease, cystic fibrosis screening, symptoms that need urgent care, and follow-up tests.

High Trypsinogen Blood Test: Causes, Pancreatitis, Pancreas Disease, and Meaning

Learn what the hyaluronic acid blood test measures, why high levels may suggest liver fibrosis, how normal ranges vary, and how results are interpreted with liver panels, ELF, FIB-4, and elastography.

Hyaluronic Acid Blood Test: High Levels, Liver Fibrosis Marker, Normal Range,...

Understand the indirect bilirubin blood test, normal range, high indirect bilirubin causes, hemolysis patterns, Gilbert syndrome, jaundice clues, and follow-up labs.

Indirect Bilirubin Blood Test: High Indirect Bilirubin, Normal Range, Hemolysis, and...

Learn what the LDH isoenzymes test measures, how LDH-1 through LDH-5 patterns relate to liver, muscle, heart, lung, pancreas, kidney, and blood cell damage, and how results are interpreted with other blood tests.

LDH Isoenzymes Test: Liver, Heart, Muscle, Blood Cell Damage, and Results

Learn how to interpret lipase and amylase blood tests, including high and low results, pancreatitis patterns, mild elevations, non-pancreas causes, and when urgent care is needed.

Lipase and Amylase: Interpreting Pancreas Blood Tests

Learn what a lipase blood test measures, what high or low lipase can mean, how results relate to pancreatitis, normal ranges, urgent symptoms, and follow-up testing.

Lipase Blood Test: High Lipase, Normal Range, Pancreatitis, Pancreas Disease, and...

Understand liver function tests, including ALT, AST, ALP, GGT, bilirubin, and albumin, with clear explanations of normal ranges, abnormal patterns, common causes, follow-up testing, and urgent warning signs.

Liver Function Tests (LFTs) Panel: ALT, AST, ALP, GGT, Bilirubin, Albumin,...

Learn what a low ALT blood test can mean, including vitamin B6 deficiency, low muscle mass, aging, nutrition issues, liver health patterns, and when follow-up is needed.

Low Alanine Aminotransferase (ALT) Test: Causes, Vitamin B6, Liver Health, and...

Low albumin blood test results can point to liver disease, kidney protein loss, inflammation, malnutrition, gut protein loss, or fluid overload. Learn what the pattern means and which follow-up tests matter.

Low Albumin Blood Test: Causes, Liver Disease, Kidney Loss, Malnutrition, and...

Learn what a low albumin/globulin ratio means, including common causes such as liver disease, inflammation, kidney protein loss, infection, autoimmune disease, malnutrition, and high globulin.

Low Albumin/Globulin (A/G) Ratio Test: Causes, Liver Disease, Inflammation, and Meaning

Low alkaline phosphatase can point to zinc deficiency, malnutrition, thyroid disease, anemia, Wilson disease, or rare hypophosphatasia. Learn what low ALP means, which follow-up tests help, and when medical care matters.

Low Alkaline Phosphatase (ALP) Test: Causes, Zinc Deficiency, Malnutrition, and Meaning

Low ALP can reflect zinc deficiency, malnutrition, hypothyroidism, anemia, lab interference, or hypophosphatasia. Learn how to interpret low alkaline phosphatase patterns with zinc and related blood tests.

Low ALP and Zinc: Interpreting Low Alkaline Phosphatase Patterns

Low amylase may suggest chronic pancreas damage, exocrine pancreatic insufficiency, cystic fibrosis, metabolic patterns, or lab variation. Learn causes, symptoms, follow-up tests, and when to seek care.

Low Amylase Blood Test: Causes, Pancreas Function, and Meaning

Low AST is usually less concerning than high AST, but it can sometimes relate to vitamin B6 status, low muscle mass, malnutrition, chronic illness, or lab variation. Learn how to interpret low AST with ALT, liver panel results, symptoms, and follow-up testing.

Low Aspartate Aminotransferase (AST) Test: Causes, Vitamin B6, Liver Health, and...

Low globulin on a blood test can reflect low antibodies, protein loss, liver disease, kidney disease, malnutrition, or lab variation. Learn what patterns and follow-up tests help clarify the cause.

Low Globulin Blood Test: Causes, Immune Deficiency, Protein Loss, and Meaning

Low total protein on a blood test can mean low albumin, low globulin, malnutrition, liver disease, kidney protein loss, gut protein loss, inflammation, or fluid dilution.

Low Total Protein Blood Test: Causes, Malnutrition, Liver Disease, Kidney Loss,...

Low trypsinogen may suggest reduced pancreas enzyme production, especially with greasy stools, weight loss, chronic pancreatitis, or pancreatic surgery. Learn causes, follow-up tests, symptoms, and treatment options.

Low Trypsinogen Blood Test: Causes, Pancreas Function, and Meaning

Learn what the NASH FibroSure test measures, how fibrosis, steatosis, and NASH scores are interpreted, what abnormal results may mean, and when follow-up testing matters.

NASH FibroSure Test: Fatty Liver, NASH, Steatosis, Fibrosis Score, and Results

Learn what a pancreatic amylase test measures, what high pancreatic amylase can mean, how normal ranges vary, and how results relate to pancreatitis, lipase, and pancreas health.

Pancreatic Amylase Test: High Pancreatic Amylase, Normal Range, Pancreatitis, and Pancreas...

Learn what the PEth blood test measures, how PEth levels are interpreted, how long PEth stays detectable, and how results compare with CDT, GGT, EtG, and liver enzyme tests.

Phosphatidylethanol (PEth) Blood Test: Alcohol Biomarker, PEth Levels, Detection Window, and...

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