Aldosterone-Renin Ratio (ARR) Test: Primary Aldosteronism, Blood Pressure, and Results
The aldosterone–renin ratio is the standard blood-screening approach for primary aldosteronism, a common hormonal cause of high blood pressure. The test measures aldosterone and...
Androstenedione Blood Test: High, Low, Adrenal Hormones, and Results
An androstenedione blood test measures a steroid that the adrenal glands and gonads make on the way to testosterone and estrogens. Doctors use it...
Congenital Adrenal Hyperplasia (CAH) Test Panel: 17-OHP, Androgens, and Results
A congenital adrenal hyperplasia test panel measures steroid precursors, cortisol, and androgens to locate an inherited enzyme block in adrenal hormone production. For the...
Cortisol Blood Test: High, Low, Normal Range, Stress, and Adrenal Function
A cortisol blood test measures the adrenal glucocorticoid that supports blood pressure, metabolism, immune regulation, and the response to illness. The number is meaningful...
Cushing Syndrome Test Panel: Late-Night Cortisol, Urine Free Cortisol, Dexamethasone, ACTH, and Results
A Cushing syndrome test panel does not mean drawing several random hormones at once. Diagnosis follows a sequence: first exclude external glucocorticoid exposure, then...
Deoxycorticosterone (DOC) Test: Adrenal Hormone, Blood Pressure, and Results
A deoxycorticosterone test measures 11-deoxycorticosterone, usually shortened to DOC, in blood. DOC is an adrenal steroid made along the pathway that produces corticosterone and...
DHEA Blood Test: High, Low, Normal Range, Adrenal Function, and Results
A DHEA blood test measures dehydroepiandrosterone, a steroid hormone made mainly by the adrenal glands. DHEA is a building block that the body can...
DHEA-S Blood Test: High, Low, Normal Range, Adrenal Androgens, and Results
A DHEA-S blood test measures dehydroepiandrosterone sulfate, the most abundant adrenal androgen in circulation. The adrenal glands make DHEA and add a sulfate group...
High-Dose Dexamethasone Suppression Test: Cushing Disease and Results
The high-dose dexamethasone suppression test is an older dynamic hormone test used after ACTH-dependent Cushing syndrome has been established. It asks whether a large...
Late-Night Cortisol Test: High Levels, Cushing Syndrome Screening, and Results
A late-night cortisol test checks whether cortisol falls to its normal low point near bedtime. Healthy cortisol production follows a daily rhythm: levels rise...
Low-Dose Dexamethasone Suppression Test: Cushing Syndrome Screening and Results
The low-dose dexamethasone suppression test checks whether a small dose of synthetic glucocorticoid can turn down the body’s cortisol production. It is one of...
Morning Cortisol Test: Low Levels, Adrenal Insufficiency, and Results
A morning cortisol test measures cortisol near the time it should naturally be highest, usually between 8 and 9 a.m. It is often the...
Pheochromocytoma and Paraganglioma Test Panel: Metanephrines, Normetanephrine, Catecholamines, and Results
A pheochromocytoma and paraganglioma test panel looks for biochemical evidence of tumors that produce catecholamines or their metabolites. Pheochromocytomas arise in the adrenal medulla,...
Plasma Catecholamines Test: Epinephrine, Norepinephrine, Dopamine, and Results
A plasma catecholamines test measures epinephrine, norepinephrine, and dopamine in a blood sample. These fast-acting chemicals help control heart rate, blood pressure, blood flow,...
Plasma Free Metanephrines Test: Pheochromocytoma and Paraganglioma Screening, High Levels, and Results
A plasma free metanephrines test measures metanephrine and normetanephrine in blood to screen for pheochromocytoma and paraganglioma. These rare tumors arise from chromaffin tissue...
Plasma Normetanephrine Test: High Levels, Pheochromocytoma Screening, and Results
A plasma normetanephrine test measures a stable metabolite of norepinephrine and is used mainly to screen for pheochromocytoma and sympathetic paraganglioma. These tumors can...
Primary Aldosteronism Test Panel: Aldosterone, Renin, Potassium, ARR, and Results
A primary aldosteronism test panel measures aldosterone, renin, potassium, and the aldosterone-to-renin ratio, or ARR, to look for inappropriate aldosterone production. Aldosterone helps the...
Renin Blood Test: High, Low, Normal Range, Aldosterone Ratio, and Results
A renin blood test measures activity in the kidney-controlled system that regulates blood pressure, sodium, potassium, and fluid balance. Renin rises when the kidneys...
Salivary Cortisol Test: Cortisol Rhythm, Cushing Screening, Stress Hormone, and Results
A salivary cortisol test measures free cortisol that has moved from blood into saliva. It can be collected at home without a needle, making...
Urine Catecholamines Test: Adrenal Tumor Screening and Results
A urine catecholamines test measures epinephrine, norepinephrine, and dopamine excreted during a timed collection, usually 24 hours. It can help evaluate a suspected catecholamine-producing...