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Understand the 1-mg low-dose dexamethasone suppression test, the common cortisol cutoff of 1.8 mcg/dL, causes of nonsuppression, and the follow-up used for Cushing screening.

Low-Dose Dexamethasone Suppression Test: Cushing Syndrome Screening and Results

Learn how an 8–9 a.m. cortisol test screens for adrenal insufficiency, what low and intermediate results mean, how ACTH helps identify the cause, and when stimulation testing is needed.

Morning Cortisol Test: Low Levels, Adrenal Insufficiency, and Results

Learn how a pheochromocytoma and paraganglioma panel uses plasma or urine metanephrines, normetanephrine, catecholamines, and controlled collection to interpret abnormal results.

Pheochromocytoma and Paraganglioma Test Panel: Metanephrines, Normetanephrine, Catecholamines, and Results

Learn what plasma epinephrine, norepinephrine, and dopamine results mean, why collection posture matters, common causes of high values, and when metanephrine testing is preferred.

Plasma Catecholamines Test: Epinephrine, Norepinephrine, Dopamine, and Results

Learn how plasma free metanephrine and normetanephrine testing screens for pheochromocytoma and paraganglioma, why supine rest matters, and how high or borderline results are evaluated.

Plasma Free Metanephrines Test: Pheochromocytoma and Paraganglioma Screening, High Levels, and Results

Learn what a high plasma normetanephrine result means, why supine rest matters, common false-positive causes, when clonidine testing is used, and how PPGL evaluation proceeds.

Plasma Normetanephrine Test: High Levels, Pheochromocytoma Screening, and Results

Diagnostics

Home Diagnostics Page 49

Troponin and BNP: Interpreting Heart Injury vs Heart Failure Markers

Learn how troponin I and troponin T show heart muscle injury, why high results do not always mean heart attack, and how repeat testing, symptoms, ECG, kidney function, and other clues guide safe interpretation.

Troponin I and Troponin T: Interpreting Heart Injury Markers Without Overdoing...

Learn what a troponin I blood test measures, what high troponin I means, how normal ranges work, and how doctors use serial results to evaluate heart attack and heart muscle injury.

Troponin I Blood Test: High Troponin I, Normal Range, Heart Attack,...

Learn what the troponin T blood test measures, what high troponin T means, common normal ranges, heart attack patterns, causes of heart damage, and when urgent care is needed.

Troponin T Blood Test: High Troponin T, Normal Range, Heart Attack,...

Troponin vs CK-MB explained clearly: learn why troponin is the preferred heart attack marker, when CK-MB still helps, and how doctors interpret abnormal cardiac enzyme results.

Troponin vs CK-MB: Which Heart Attack Marker Matters More?

Learn how ACEs screening works, what adverse childhood experiences questionnaires measure, how scores are interpreted, what happens after a positive screen, and where this assessment has limits.

ACEs Screening: How Adverse Childhood Experiences Are Assessed

Learn how ADHD testing in children really works, including what the evaluation includes, how doctors diagnose ADHD, what conditions can mimic it, and what happens next.

ADHD Testing in Children: How the Diagnostic Process Works

Learn how ADHD and learning disability testing differ, what each evaluation measures, why the symptoms overlap, and how clinicians and schools identify the right diagnosis and support.

ADHD vs Learning Disability: How Testing Separates the Two

Learn what the ADOS autism test measures, how ADOS-2 modules work, when clinicians use it, and how results fit into a full autism evaluation.

ADOS Autism Test: What It Measures and When It Is Used

Learn how adult ADHD testing works, what doctors look for, which tools may be used, and how ADHD is diagnosed in adults using history, symptoms, impairment, and differential diagnosis.

Adult ADHD Testing: How ADHD Is Diagnosed in Adults

Learn how AI is being used in cognitive testing, from digital drawing and speech analysis to remote monitoring, along with the benefits, risks, and limits that still matter.

AI in Cognitive Testing: How New Tools Are Being Used

Learn what AI can really do in mental health diagnosis, where it helps clinicians, why it still falls short, and how to judge AI screening, chatbot, and diagnostic tools safely.

AI in Mental Health Diagnosis: What It Can Do, What It...

Learn how doctors screen for problem drinking, which alcohol screening tests they use, what a positive result means, and what usually happens after alcohol use screening.

Alcohol Use Screening: How Doctors Test for Problem Drinking

Learn what an Alzheimer’s workup includes, from history, cognitive testing, labs, and MRI to biomarker tests such as amyloid blood tests and PET scans, and how doctors reach the diagnosis.

Alzheimer’s Testing and Diagnosis: What the Workup Looks Like

Learn what amyloid blood tests show, who they are for, how results are interpreted, and how they compare with PET scans and spinal fluid testing.

Amyloid Blood Tests: What They Show and Who They Are For

Learn what an amyloid PET scan shows, when doctors use it in Alzheimer’s diagnosis, how to interpret positive and negative results, and how it compares with blood tests, MRI, CSF, and tau PET.

Amyloid PET Scan: How It Helps in Alzheimer’s Diagnosis

Learn how doctors screen for anxiety disorders using tools like the GAD-2 and GAD-7, clinical questions, and follow-up evaluation to decide what symptoms may need treatment.

Anxiety Screening: How Doctors Screen for Anxiety Disorders

Learn how doctors tell anxiety from ADHD by comparing symptoms, triggers, timeline, testing, and overlap so the right diagnosis and treatment are easier to understand.

Anxiety vs ADHD: How Doctors Tell the Difference

Learn what APOE genetic testing for Alzheimer’s risk can and cannot tell you, how to interpret e2, e3, and e4 results, and when genetic counseling matters most.

APOE Genetic Testing for Alzheimer’s Risk: What It Can and Cannot...

Learn what the ASQ suicide screening tool measures, where it is used, what a positive screen means, and how it fits into clinical suicide risk assessment and next-step safety planning.

ASQ Suicide Screening: What It Measures and When It Is Used

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