4-hydroxyphenylacetic aciduria

What it means

Increased concentration of 4-hydroxyphenylacetic acid in the urine.

4-Hydroxyphenylpyruvate dioxygenase participates in the tyrosine catabolic pathway by catalyzing the conversion of 4-hydroxyphenylpyruvate to homogentisate. A deficiency in this enzyme can result in 4-Hydroxyphenylacetic aciduria.

Rare diseases that can present with this2

The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.

Part of the broader category

Also called: Elevated urine 4-hydroxyphenylacetic acid level