Urine melanin (Thormahlen's test, Melanin

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Urine melanin

Alternate Names : Thormahlen's test, Melanin - urine

Definition

Urine melanin is a test to determine the abnormal presence of melanin in the urine.

Why is the Test Performed?

This test is used to diagnose melanoma, a type of skin cancer that produces melanin. If the cancer spreads (especially within the liver), the cancer may produce enough of this substance that it shows up in the urine.

How is the Test Performed?

A clean-catch urine sample is needed.

How to Prepare for the Test?

No special preparation is needed.

How will the Test Feel?

The test involves only normal urination.

Pictures & Images

Urine sample

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Urine melanin : Definition
Urine melanin : Why is the Test Performed?
Urine melanin : How is the Test Performed?
Urine melanin : How to Prepare for the Test?
Urine melanin : How will the Test Feel?
Urine melanin : Risks
Urine melanin : Special Considerations
Urine melanin : Normal Values
Urine melanin : What do Abnormal Results Mean?
Urine melanin : Pictures & Images
Urine sample

Review Date : 8/24/2009
Reviewed By : Frank A. Greco, M.D., Ph.D., Director, Biophysical Laboratory, The Lahey Clinic, Burlington, MA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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