| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Atypical autism | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Asperger's disorder | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Rett syndrome | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Childhood disintegrative disorder | Is a | False | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Idiot savant | Is a | False | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| [X]Overactive disorder associated with mental retardation and stereotyped movements | Is a | False | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| [X]Other pervasive developmental disorders | Is a | False | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| [X]Pervasive developmental disorder, unspecified | Is a | False | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| [X]Other childhood disintegrative disorder | Is a | False | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Autistic spectrum disorder with isolated skills (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Autistic disorder | Is a | False | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| autistiforme stoornis | Is a | False | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Savant syndrome (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Active but odd autism | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder of residual state | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| FOXG1 syndrome | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pathological demand avoidance | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Atypical Rett syndrome (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Isodicentric chromosome 15 syndrome (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with marked impairment of functional language without loss of previously acquired skills (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with disorder of intellectual development without loss of previously acquired skills (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with impairment of functional language (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with marked impairment of functional language with loss of previously acquired skills (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with disorder of intellectual development and pervasive impairment of functional language without loss of previously acquired skills (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with disorder of intellectual development with loss of previously acquired skills | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with disorder of intellectual development and marked impairment of functional language with loss of previously acquired skills | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with disorder of intellectual development and marked impairment of functional language without loss of previously acquired skills | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with disorder of intellectual development and complete impairment of functional language without loss of previously acquired skills (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with disorder of intellectual development and absence of functional language with loss of previously acquired skills (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with disorder of intellectual development and complete impairment of functional language with loss of previously acquired skills | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with severe impairment of functional language with loss of previously acquired skills (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with severe impairment of functional language without loss of previously acquired skills (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with abscence of functional language (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with complete impairment of functional language with loss of previously acquired skills | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with complete impairment of functional language without loss of previously acquired skills (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with complete impairment of functional language (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with cognitive developmental delay and complete impairment of functional language (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Pervasive developmental disorder with cognitive developmental delay and marked impairment of functional language (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Intellectual disability, macrocephaly, hypotonia, behavioural abnormalities syndrome | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Family history of autism | Associated finding | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some | 1 | 
| Suspected autism | Associated finding | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some | 1 | 
| Screening for autism | Has focus | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some | 1 | 
| Family history of autism in sibling | Associated finding | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some | 1 | 
| High-functioning autism (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Autistic disorder of childhood onset | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Infantile autism (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| ADNP-related multiple congenital anomalies, intellectual disability, autism spectrum disorder | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Autism spectrum disorder due to AUTS2 deficiency | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| 1p21.3 microdeletion syndrome (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| syndroom van autisme en faciale naevus flammeus | Is a | False | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Autism spectrum disorder, epilepsy, arthrogryposis syndrome (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  | 
| Macrocephaly, intellectual disability, autism syndrome (disorder) | Is a | True | Pervasive developmental disorder (disorder) | Inferred relationship | Some |  |