Uromelanin

The tyrosine in the body is catalyzed by tyrosine transaminase to become p-hydroxyphenylpyruvate, which is then reacted with p-hydroxyphenylpyruvate oxidase to form uric acid. Normal urine does not contain melanin, so the qualitative test is negative. There are a lot of tyrosinase in melanoma, so melanin can appear in the urine of patients with melanoma. The eye is a good site for melanoma. Hepatic metastatic melanoma patients often have a large amount of melanin in the urine, which can be used as an important basis for the diagnosis of the disease. Basic Information Specialist classification: growth and development check classification: urine / kidney function test Applicable gender: whether men and women apply fasting: fasting Analysis results: Below normal: Normal value: no Above normal: negative: normal. Positive: Found in black urine disease (also known as urine black aciduria). Tips: Do not exercise vigorously, maintain a good diet and work. The middle part of the urine is taken for inspection. Normal value negative. Clinical significance This test is positive and is found in black urine disease (also known as urinary aciduria). Positive results may be diseases: pediatric black aciduria syndrome, brownish yellow disease precautions Before the test: Do not exercise vigorously, maintain a good diet and rest. At the time of examination: a part of the urine is discharged first to wash away the bacteria remaining in the urethra and the anterior urethra, and then the middle part of the urine is taken for inspection. Inspection process The urine of the subject was collected and examined by microscopy. Not suitable for the crowd Generally no taboos. Adverse reactions and risks No.