Tyrosinemia, Type III (TYR-III)


Tyrosinemia, Type III (TYR-III) is an inherited condition in which the body is unable to break down the amino acid tyrosine, a building block of proteins. TYR-III can cause learning problems, seizures, and loss of balance. Detecting TYR-III early and beginning treatment, including special formulas, prevent some of the serious outcomes of the condition.

This condition is also known as: tyrosinemia due to 4-hydroxyphenylpyruvate dioxygenase deficiency, tyrosinemia due to 4-hydroxyphenylpyruvic acid oxidase deficiency, tyrosinemia due to HPD deficiency, tyrosinemia type III.

For more information about Tyrosinemia, Type III, go to Baby's First Test: Tyrosinemia, Type III. Please see Medically Prescribed Formula for information about medically prescribed formula and pharmacologic interventions for inborn errors of metabolism. Visit Board Certified Metabolic Providers (PDF: 2 pages/204KB) for a listing of medical specialists and clinic contact information.