Trait
Delusions
Clinical name: Delusion
A delusion is a fixed false belief held despite evidence to the contrary. The term delusion broadly encompasses all false judgments that possess the following external characteristics to a significant, albeit unspecified, extent: (1) they are held with an exceptional level of conviction, accompanied by an unparalleled subjective certainty; (2) there is an inability to consider alternative experiences or compelling counter-arguments; (3) the content of the belief is impossible.
Summary
- Body system
- Abnormality of the nervous system
Reference genomeGRCh38hg38
Positions on gene and variant pages follow this choice, in this browser.
Read the genes linked to Delusions, and the rest of your genome, with one test.
From $449Free shipping · Results in 6–8 weeks
Get my Genome Test29 genes linked to Delusions
Changes in these genes cause rare conditions in which Delusions is seen. Most people with this trait have none of those conditions, and a gene on this list says nothing about anyone's own genome.
| Gene | How often it is seen | Conditions |
|---|---|---|
| HTRA1HtrA serine peptidase 1 | Always | In 1 condition |
| ARSAarylsulfatase A | Often (30–79%) | In 4 conditions |
| CSF1Rcolony stimulating factor 1 receptor | Often (30–79%) | In 1 condition |
| HTThuntingtin | Often (30–79%) | In 1 condition |
| PRNPprion protein (Kanno blood group) | Often (30–79%) | In 4 conditions |
| PSAPprosaposin | Often (30–79%) | In 3 conditions |
| SLC25A13solute carrier family 25 member 13 | Often (30–79%) | In 1 condition |
| SLC2A3solute carrier family 2 member 3 | Often (30–79%) | In 1 condition |
| MAN2B1mannosidase alpha class 2B member 1 | Sometimes (5–29%) | In 2 conditions |
| PLA2G6phospholipase A2 group VI | Sometimes (5–29%) | In 1 condition |
| TRANK1tetratricopeptide repeat and ankyrin repeat containing 1 | Sometimes (5–29%) | In 1 condition |
| APOL2apolipoprotein L2 | Not recorded | In 1 condition |
| C9orf72C9orf72-SMCR8 complex subunit | Not recorded | In 1 condition |
| CHI3L1chitinase 3 like 1 | Not recorded | In 1 condition |
| CYP27A1cytochrome P450 family 27 subfamily A member 1 | Not recorded | In 1 condition |
| DAOAD-amino acid oxidase activator | Not recorded | In 1 condition |
| DISC2disrupted in schizophrenia 2 | Not recorded | In 1 condition |
| DRD3dopamine receptor D3 | Not recorded | In 1 condition |
| EIF2B1eukaryotic translation initiation factor 2B subunit alpha | Not recorded | In 1 condition |
| GBA1glucosylceramidase beta 1 | Not recorded | In 1 condition |
| HLA-DQB1major histocompatibility complex, class II, DQ beta 1 | Not recorded | In 1 condition |
| HTR2A5-hydroxytryptamine receptor 2A | Not recorded | In 1 condition |
| JPH3junctophilin 3 | Not recorded | In 1 condition |
| MTHFRmethylenetetrahydrofolate reductase | Not recorded | In 1 condition |
| PPP2R2Bprotein phosphatase 2 regulatory subunit Bbeta | Not recorded | In 1 condition |
| RTN4Rreticulon 4 receptor | Not recorded | In 1 condition |
| SNCAsynuclein alpha | Not recorded | In 1 condition |
| SNCBsynuclein beta | Not recorded | In 1 condition |
| SYN2synapsin II | Not recorded | In 1 condition |
How often is among people with one of the gene's conditions, the most often across them, as the Human Phenotype Ontology records it. These pages describe traits and the research behind them; they are not a diagnosis, and a doctor or genetic counsellor is the person to ask about symptoms.
Broader traits
Where this comes from
- The Human Phenotype Ontology, release 2026-09-01: the trait, its names, its definition and the genes linked to it. Find out more at hpo.jax.org.
- Data release 2026.10.16-c6eea6bf.
One test. A lifetime of answers.
From $449Free shipping · Results in 6–8 weeks