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Zorluk: OrtaSchizophrenia and Psychotic Disorders

A 32-year-old man is brought to the psychiatric clinic by his sister for a follow-up evaluation. The patient has a 10-month history of continuous psychiatric symptoms. According to the sister, the illness began with a 7-month period during which the patient experienced severe sadness, loss of appetite, hypersomnia, and intense feelings of worthlessness. During this same 7-month period, he also began hearing voices plotting to harm him and firmly believed his neighbors were attempting to poison his water supply. Following a medication adjustment 3 months ago, the patient's mood, appetite, and sleep completely returned to normal, and he no longer feels sad or worthless. However, over the past 3 months of euthymia, he has continued to hear voices and remains convinced that his water is poisoned. He does not use illicit substances, and a urine drug screen is negative. Which of the following is the most likely diagnosis?

  1. Schizoaffective disorderCevap
  2. B
    Major depressive disorder with psychotic features
  3. C
    Schizophrenia
  4. D
    Schizophreniform disorder
  5. E
    Delusional disorder

Cevap

Schizoaffective disorder
The correct diagnosis is schizoaffective disorder. To meet DSM-5 criteria for this condition, a patient must experience an uninterrupted period of illness during which there is a major mood episode concurrent with active phase symptoms of schizophrenia. Crucially, the patient must also experience psychotic symptoms (delusions or hallucinations) for ≥2\ge 2 weeks in the absence of a major mood episode. Finally, the mood symptoms must be present for the majority of the total duration of the active and residual portions of the illness. This patient perfectly meets these criteria: he has a total illness duration of 10 months, with 7 months of concurrent mood and psychotic symptoms, followed by 3 months of psychosis during a period of complete euthymia. Because the mood symptoms were present for 7 out of 10 months, they account for the majority of the illness duration.

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1
Establish the total duration of the patient's illness and characterize all symptom domains.
The total continuous illness duration is 10 months. Symptoms include a major depressive episode (7 months) and active psychotic symptoms including hallucinations and delusions (10 months total).
Establishing the total timeline and symptom overlap is necessary to differentiate brief, schizophreniform, and chronic psychotic disorders from mood disorders.
2
Analyze the temporal relationship between the mood symptoms and psychotic symptoms.
The patient had concurrent mood and psychotic symptoms for 7 months, followed immediately by 3 months of pure psychotic symptoms in the complete absence of any mood symptoms.
Differentiating primary mood disorders from primary psychotic disorders requires evaluating whether psychosis exists independently of mood episodes for a clinically significant duration (≥2\ge 2 weeks).
3
Synthesize the findings to apply DSM-5 diagnostic criteria for psychotic disorders.
The patient has psychosis lasting ≥2\ge 2 weeks without a mood episode, ruling out a primary mood disorder with psychotic features. Furthermore, the mood symptoms were present for the majority of the total illness duration (7 out of 10 months), pointing directly to schizoaffective disorder rather than schizophrenia.
These precise temporal features are the hallmark criteria that separate schizoaffective disorder from other conditions on the schizophrenia spectrum.

Anahtar Kavram

The diagnosis of schizoaffective disorder requires an uninterrupted period of illness featuring a major mood episode concurrent with schizophrenia symptoms, delusions or hallucinations lasting ≥2\ge 2 weeks in the absence of a major mood episode, and mood symptoms present for the majority of the total illness duration.
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Schizophrenia and Psychotic Disorders

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