<unk>  is a rare type of disorder that affects roughly 10 percent of all adults with autism spectrum disorder. Most are not severely affected but a few exhibit stupor and severe excitement, which is the most extreme form of the disorder. Full expression of excitement could be a sign of comorbid bipolar disorder but more research is needed. More than 40 symptoms have been identified to be a result of the disorder, but some of the symptoms overlap with those of autism spectrum disorder, making diagnosing difficult even for a seasoned professional. In a few cases stupor and hyperactivity can continue for weeks or even months. During the excitement phase individuals show combativeness and can have delusions and hallucinations and can also pose a danger to themselves or others and can make marked destruction of property. In the later stages of medium and even more in the severe (and, if left untreated, lethal) state they will also experience autonomic instability. Childhood schizophrenia increases the risk for<unk>  later in life dramatically. There seems to be a common font of brain pathology for psychosis,<unk>  and autism.
Autistic catatonia
Tardive dysmentia
Trichothiodystrophy
Selective mutism
Taurodontism
Klismaphilia
Tourettism
Machiavellianism