Tyrosinemia type III, caused by deficiency of 4-hydroxyphenylpyruvate dioxygenase, is a rare disorder of tyrosine catabolism. Primary 4- hydroxyphenylpyruvate dioxygenase deficiency has been described in only three patients. The biochemical phenotype shows hypertyrosinemia and elevated urinary excretion of 4-hydroxyphenyl derivatives. We report the clinical and biochemical findings and the results of long-term follow-up in a new patient with this disorder presenting with severe mental retardation and neurological abnormalities. The clinical phenotype is compared with those reported in the three previously described patients.
|Number of pages||3|
|Journal||Acta Paediatrica, International Journal of Paediatrics|
|Publication status||Published - 1997|
- 4-Hydroxyphenylpyruvate dioxygenase deficiency
- Tyrosinemia type III
ASJC Scopus subject areas
- Pediatrics, Perinatology, and Child Health