Patient's question:
The baby's urine has a slightly unpleasant odor, and I don't know what's causing it. So, I went to the nearby hospital for a routine and thorough examination. The doctor said that the baby's blood test results showed a positive value for phenylketonuria, but it couldn't be diagnosed yet and further tests were needed.What kind of help is needed: What should the phenylketonuria value be for a newborn?
Doctor's answer:
Phenylketonuria (PKU) is a genetic metabolic disorder caused by a reduction in the activity of phenylalanine hydroxylase or a deficiency of its coenzyme tetrahydrobiopterin, leading to elevated phenylalanine levels in the blood and tissues. It results in significantly increased levels of phenylpyruvate, phenylacetic acid, and phenyllactic acid in the urine. Generally, there are no obvious specific clinical diagnostic symptoms during the neonatal period.There are many reasons for the initial high readings, which may be influenced by maternal factors or dietary factors, among others, causing elevated neonatal indicators. If the second test is normal, there is usually no significant issue. If you are still concerned, you can undergo a third follow-up test.