Metanephrine (Normetanephrine, 3-Methoxytyramine) in 24-Hour Urine

Testing for metanephrine (normetanephrine, 3-methoxytyramine) in urine is an essential diagnostic tool to detect excessive production of these metabolites, which is often linked to certain types of tumors. This test can help diagnose and monitor conditions affecting the endocrine system. At IntroLab, our specialists utilize the latest technologies and methods to deliver the most accurate and reliable results.

What is Metanephrine (Normetanephrine, 3-Methoxytyramine)?

Metanephrines are metabolites of the hormones adrenaline and noradrenaline, produced by the adrenal glands. They belong to a group of compounds called catecholamines. These hormones play a crucial role in regulating various bodily functions, such as heart rate, blood pressure, and blood sugar levels, and are involved in the “fight or flight” response to stress.

Why is Measuring This Parameter Important?

Measuring metanephrine levels in urine is important because excessive production can indicate the presence of pheochromocytoma or paraganglioma. These rare tumors can cause significant health problems, including high blood pressure, palpitations, headaches, sweating, and, in extreme cases, can be life-threatening.

How is Metanephrine (Normetanephrine, 3-Methoxytyramine) Tested in Urine?

To test for metanephrines, a 24-hour urine sample is required. It is essential to collect all urine during this period, as metanephrine levels can fluctuate throughout the day. The collected sample is then analyzed in a laboratory.

Preparing for the Test

Your doctor will provide specific instructions on how to prepare for the test. This typically involves avoiding certain foods and medications that could affect the results, such as coffee, tea, bananas, citrus fruits, vanilla, alcohol, and certain asthma, blood pressure, and depression medications.

Types of Metanephrine Tests

Besides the 24-hour urine test, there is also a plasma free metanephrines test. Both tests are used for diagnosis and can be combined to increase diagnostic accuracy.