Urine melanin test is a test to determine the abnormal presence of
Thormahlen's test; Melanin - urine
How the Test is Performed
How to Prepare for the Test
No special preparation is needed.
How the Test will Feel
The test involves only normal urination.
Why the Test is Performed
This test is used to diagnose
Normally, melanin is not present in urine.
Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or test different samples. Talk to your health care provider about the meaning of your specific test results.
What Abnormal Results Mean
If melanin is present in the urine, malignant
There are no risks associated with this test.
This test is rarely done anymore to diagnose melanoma because there are better tests available.
Cruz DJS, Gru AA. Tumors of the skin. In: Fletcher CDM, ed. Diagnostic Histopathology of Tumors. 5th ed. Philadelphia, PA: Elsevier; 2021:chap 23.
Mitchell TC, Karakousis G, Schuchter L. Melanoma. In: Niederhuber JE, Armitage JO, Kastan MB, Doroshow JH, Tepper JE, eds. Abeloff's Clinical Oncology. 6th ed. Philadelphia, PA: Elsevier; 2020:chap 66.
Review Date: 16/10/2022
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