title: Inborn errors of purine–pyrimidine metabolism
text: # Inborn errors of purine–pyrimidine metabolism
  
  Inborn errors of purine–pyrimidine metabolism are a class of inborn error of metabolism disorders specifically affecting purine metabolism and pyrimidine metabolism. An example is Lesch–Nyhan syndrome.
  
  Urine tests may be of use in identifying some of these disorders.
  
  