| Tetrahydrobiopterin deficiency | Phenylketonurias | Phenylketonuria | Hyperphenylalaninemia, Non-Phenylketonuric | Hyperphenylalaninemia, Non Phenylketonuric | Non-Phenylketonuric Hyperphenylalaninemias | BH4 Deficiency | Deficiency, BH4 | Non-Phenylketonuric Hyperphenylalaninemia | Non Phenylketonuric Hyperphenylalaninemia | Tetrahydrobiopterin Deficiency | Deficiency, Tetrahydrobiopterin | Hyperphenylalaninemia Caused by a Defect in Biopterin Metabolism | Phenylketonuria II | DHPR Deficiency | Deficiency, DHPR | Dihydropteridine Reductase Deficiency | Deficiency, Dihydropteridine Reductase | Dihydropteridine Reductase Deficiency Disease | HPABH4C | Hyperphenylalaninemia, Tetrahydrobiopterin-Deficient, Due To DHPR Deficiency | Phenylketonuria, Atypical | Atypical Phenylketonuria | PKU, Atypical | Atypical PKU | QDPR Deficiency | Deficiency, QDPR | Quinoid Dihydropteridine Reductase Deficiency | Hyperphenylalaninemia, BH4-Deficient, C | Deficiency Disease, Dihydropteridine Reductase | Phenylketonuria Type 2 | Hyperphenylalaninaemia | Phenylketonuria I | Deficiency Disease, Phenylalanine Hydroxylase, Severe | Folling Disease | Disease, Folling | Folling's Disease | Disease, Folling's | Phenylketonuria, Classical | Classical Phenylketonuria | PAH Deficiency | Deficiency, PAH | Phenylalanine Hydroxylase Deficiency | Deficiency, Phenylalanine Hydroxylase | Phenylalanine Hydroxylase Deficiency Disease | Phenylalanine Hydroxylase Deficiency Disease, Severe | Deficiency Disease, Phenylalanine Hydroxylase | Oligophrenia Phenylpyruvica |
