What does elevated plasma Metanephrines mean?

Higher levels of metanephrines may mean that you have an adrenal gland tumor. But false-positive results can happen. Higher levels may also be caused by obstructive sleep apnea, stress, or other illnesses.

What is a plasma Metanephrines blood test?

What is a plasma metanephrine test? It’s a test to help diagnose a condition of the adrenal glands. These are found at the top of the kidneys and are responsible for producing the hormones adrenaline and noradrenaline, which are required for the normal working of the body.

What does Metanephrine free mean?

The plasma free metanephrines test is used to help diagnose or rule out the presence of a rare tumor called a pheochromocytoma or a paraganglioma (PPGL) that releases excess metanephrines. Testing also may be used when a tumor has been treated or removed to monitor for recurrence.

What does high normetanephrine free mean?

High levels of Normetanephrine can be from a pheochromocytoma. This is usually a benign tumor that stems from aberrant cells in the adrenal gland. The tumor produces hormones that cause high blood pressure. The high blood pressure can cause life-threatening situations, such as a heart attack.

What are the symptoms of a tumor on the adrenal gland?

Adrenal Gland Tumor: Symptoms and Signs

• High blood pressure.
• Low potassium level.
• Heart palpitations.
• Nervousness.
• Feelings of anxiety or panic attacks.
• Headache.
• Heavy sweating/perspiration.
• Diabetes.

What do Metanephrines do?

They make the hormone adrenaline and other adrenaline-like chemicals called catecholamines. Adrenaline regulates your blood pressure and helps you cope with stress. Metanephrine and normetanephrine are catecholamines that result when adrenaline breaks down.

What are normal metanephrine levels in urine?

metanephrine: 24 to 96 mcg/24-hours (some laboratories give the range as 140 to 785 mcg/24-hours) normetanephrine: 75 to 375 mcg/24-hours.

How do you read Metanephrines test results?

What do my test results mean?

1. If your 24-hour metanephrine level is between 1 and 2 times the normal amount, there is about a 30% chance you have a pheochromocytoma or paraganglioma.
2. If your 24-hour metanephrine level is twice the normal level or higher, it’s likely that you have a pheochromocytoma or paraganglioma.

How do you prepare for a metanephrine test?

Patient Preparation Patient should be fasting overnight (water and non-caffeinated soft drinks are permissible). Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection.

What can increase Metanephrines?

Plasma metanephrines may be slightly elevated due to withdrawal from benzodiazepines, alcohol and clonidine. Certain anesthetics, cocaine and cardiac antiarrhythmics such as lidocaine can elevate plasma metanephrines. Catecholamines increase in response to acute stress or discomfort.

How do you read metanephrine test results?

What are normal urine metanephrine levels?

metanephrine: 24 to 96 mcg/24-hours (some laboratories give the range as 140 to 785 mcg/24-hours) normetanephrine: 75 to 375 mcg/24-hours. total urine catecholamines: 14 to 110 mcg/24-hours.

How do I know if my adrenal gland is cancerous?

Muscle weakness. Pink or purple stretch marks on the skin. Hormone changes in women that might cause excess facial hair, hair loss on the head and irregular periods. Hormone changes in men that might cause enlarged breast tissue and shrinking testicles.

How do you know if adrenal tumors are cancerous?

Most tumors in the adrenal glands are not cancer. (These may be called benign tumors.) It’s often hard to tell if an adrenal tumor is cancer (malignant) or benign. If the tumor grows and spreads to lymph nodes or other parts of the body, it’s cancer.

How do you know if you have a tumor on your adrenal gland?

Symptoms of adrenal tumors depend on which type of tumor you have and where it is located. Common symptoms include a rise in blood pressure, unexplained weight gain or weakness, dramatically increased thirst or urination, or other symptoms.

Does caffeine increase Metanephrines?

Caffeine resulted in increased excretion of both metanephrine and normetanephrine (Table 1).

Which lab test for 24-hour urine metanephrines is recommended?

For those centers where sampling blood in the fully recumbent, supine position is not possible, testing for 24-hour urine metanephrines (LabCorp test No. 004234) may be preferable. 2,15,30

What are the dietary recommendations for patients with elevated metanephrine levels?

Patient should be fasting overnight (water and non-caffeinated soft drinks are permissible). Patient should avoid alcohol, coffee, tea, tobacco and strenuous exercise prior to collection. See Limitations section for more information about other potential causes of elevated metanephrines.

What is the optimal cut-off for optimal performance for plasma metabolites?

For plasma metabolites, optimal performance was obtained using age-specific reference intervals for normetanephrine, 25,27 and for metanephrine single cut-offs for males and females that were slightly above 99.5 percentiles contributed to optimized performance. 25-26