title: New defects of pyrimidine metabolism.
mesh_terms: D002675:Child, Preschool; D002849:Chromatography, Gas; D008401:Gas Chromatography-Mass Spectrometry; D006801:Humans; D011686:Purine-Pyrimidine Metabolism, Inborn Errors / Q000175:diagnosis / Q000378:metabolism*; D011687:Purines / Q000652:urine; D011743:Pyrimidines / Q000378:metabolism* / Q000652:urine; D013941:Thymine / Q000652:urine; D014498:Uracil / Q000652:urine
chemical_list: D011687:Purines; D011743:Pyrimidines; D014498:Uracil; D013941:Thymine