Delusional Disorder
Delusional disorder is characterized by the presence of one or more non-bizarre delusions lasting at least one month. Crucially, the patient’s overall psychosocial functioning is not markedly impaired, and behavior is not obviously bizarre or odd, apart from the impact of the delusion.
Common Types of Delusions
| Type | Definition |
|---|---|
| Erotomanic | Belief that another person (usually of higher status) is in love with them. |
| Grandiose | Belief in having a great, unrecognized talent, insight, or discovery. |
| Jealous | Belief that their spouse or partner is unfaithful. |
| Persecutory | Belief that they are being conspired against, spied on, or obstructed. |
| Somatic | Belief involving bodily functions or sensations (e.g., infestation, dysmorphia). |
High-Yield Clinical Notes:
- Differential Diagnosis: Essential to rule out medical conditions (e.g., neurological disorders, drug use) and other primary psychiatric illnesses (e.g., Schizophrenia, Bipolar Disorder).
- Schizophrenia vs. Delusional Disorder: In Delusional Disorder, there are no hallucinations (or only tactile/olfactory related to the delusion), no negative symptoms, and no cognitive decline.
- Management: Challenging due to poor insight; patients rarely seek help voluntarily. Antipsychotic medications are the mainstay of treatment, though efficacy is variable.