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Understand ALK fusion testing in lung cancer, including what a positive or negative result means, tissue and ctDNA methods, limitations, and treatment relevance.

ALK Fusion Test for Lung Cancer: Gene Fusion, Positive Result, and Molecular Meaning

Understand BRAF V600E testing in lung cancer, including what a positive or negative result means, tissue and ctDNA methods, limitations, and treatment relevance.

BRAF V600E Test for Lung Cancer: Mutation Status, Positive Result, and Molecular Meaning

Learn how the carcinoembryonic antigen (CEA) test is used in lung cancer, what high levels can mean, common non-cancer causes, reference ranges, and why serial trends matter.

CEA Test for Lung Cancer: Tumor Marker Monitoring, High Levels, and Result Meaning

Learn how the cytokeratin 19 fragment 21-1 (CYFRA 21-1) test is used in lung cancer, what high levels can mean, common non-cancer causes, reference ranges, and why serial trends matter.

CYFRA 21-1 Test for Lung Cancer: Tumor Marker Levels and Disease Monitoring

Understand EGFR exon 20 insertion testing in lung cancer, including what a positive or negative result means, tissue and ctDNA methods, limitations, and treatment relevance.

EGFR Exon 20 Insertion Test: Lung Cancer Mutation Status and Molecular Meaning

Understand EGFR mutation testing in lung cancer, including what a positive or negative result means, tissue and ctDNA methods, limitations, and treatment relevance.

EGFR Mutation Test for Lung Cancer: Exon 19, L858R, T790M, Mutation Status, and...

Diagnostics

Home Diagnostics Page 65

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

Learn the normal and optimal triglyceride blood test ranges, what high or low results mean, when fasting matters, and which targets help guide heart, metabolic, and pancreatitis risk.

Triglycerides Blood Test Normal and Optimal Range: Reference Values and Targets

Learn the normal VLDL cholesterol range, how VLDL is calculated from triglycerides, what high or low results mean, and when follow-up testing matters.

VLDL Cholesterol Test Normal Range: Reference Values and Meaning

Learn the aldosterone blood test normal range, why upright and supine values differ, and what high or low aldosterone may mean with renin, potassium, sodium, blood pressure, and kidney function.

Aldosterone Blood Test Normal Range: Reference Values and Meaning

Learn the normal anion gap blood test range, how it is calculated, what high and low results mean, and when abnormal values may need urgent follow-up.

Anion Gap Blood Test Normal Range: Reference Values and Meaning

Learn what a beta-2 microglobulin blood test means, including high B2M causes, kidney function links, urine B2M, blood cancer monitoring, normal ranges, and follow-up steps.

Beta-2 Microglobulin Blood Test: High Levels, Kidney Function, Blood Cancer Marker,...

Learn how bicarbonate and anion gap blood tests help interpret metabolic acidosis, high anion gap patterns, kidney disease, ketoacidosis, and urgent acid-base results.

Bicarbonate and Anion Gap: Interpreting Acid-Base Blood Tests

Learn the normal bicarbonate blood test range, what low or high CO2/HCO3 results mean, and how kidneys, lungs, electrolytes, and the anion gap affect interpretation.

Bicarbonate Blood Test Normal Range: Reference Values and Meaning

Learn the normal BUN test range, what high and low blood urea nitrogen results can mean, and how BUN compares with creatinine, eGFR, hydration, diet, and kidney function.

Blood Urea Nitrogen (BUN) Test Normal Range: Reference Values and Meaning

Learn how to interpret BUN, creatinine, eGFR, and the BUN/creatinine ratio without overreacting, including dehydration patterns, kidney disease clues, repeat testing, and when follow-up matters.

BUN and Creatinine: Interpreting the Kidney Panel Without Overdoing It

Understand the BUN/creatinine ratio, including high ratio dehydration patterns, kidney disease patterns, normal ranges, causes, follow-up testing, and when abnormal results need urgent care.

BUN/Creatinine Ratio: Dehydration vs Kidney Disease Pattern

Learn the normal BUN/creatinine ratio range, what high and low ratios mean, common causes, and how to read results with BUN, creatinine, and eGFR.

BUN/Creatinine Ratio Normal Range: Reference Values and Meaning

Learn how calcium, phosphorus, and PTH work together in kidney-mineral balance, including common lab patterns, CKD-related changes, follow-up tests, and when abnormal results need prompt care.

Calcium, Phosphorus, and PTH: Interpreting Kidney-Mineral Balance

Learn the normal CO2 blood test range, what high or low carbon dioxide means, how bicarbonate relates to kidney and lung function, and when follow-up matters.

Carbon Dioxide (CO2) Blood Test Normal Range: Reference Values and Meaning

Learn the normal chloride blood test range, what high and low chloride mean, and how chloride is interpreted with sodium, potassium, bicarbonate, kidney markers, and the anion gap.

Chloride Blood Test Normal Range: Reference Values and Meaning

Understand creatinine and eGFR results, common causes of abnormal kidney function labs, when to repeat testing, and when low eGFR or high creatinine needs medical follow-up.

Creatinine and eGFR: Interpreting Kidney Function Without Panicking

Learn the normal creatinine blood test range, what high and low creatinine can mean, how eGFR changes interpretation, and when kidney follow-up is needed.

Creatinine Blood Test Normal Range: Reference Values and Meaning

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