ACTH Stimulation Test: Adrenal Insufficiency, Cortisol Response, and Results
The ACTH stimulation test checks whether the adrenal cortex can produce enough cortisol after an injection of synthetic adrenocorticotropic hormone. The medicine is called...
Adrenal Fatigue Test: Cortisol Testing, Symptoms, Limitations, and What Results Mean
There is no validated test for “adrenal fatigue,” and major endocrine organizations do not recognize it as a medical diagnosis. The term is used...
Adrenal Hormone Test Panel: Cortisol, ACTH, Aldosterone, Renin, DHEA-S, and Results
An adrenal hormone panel combines tests that answer different questions about the adrenal cortex and its control systems. Cortisol and ACTH assess the stress-hormone...
Adrenal Insufficiency Test Panel: Cortisol, ACTH, Renin, Aldosterone, and Results
An adrenal insufficiency test panel looks for inadequate cortisol and then determines whether the problem begins in the adrenal glands or in the pituitary-hypothalamic...
Aldosterone Blood Test: High, Low, Normal Range, Blood Pressure, and Results
An aldosterone blood test measures the adrenal hormone that helps the kidneys retain sodium and excrete potassium. Clinicians use it with renin to investigate...
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...