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Difficulty: MediumSchizophrenia and Psychotic Disorders

Match each clinical scenario describing a patient with psychotic symptoms to the most appropriate primary psychiatric diagnosis.

  • A 45-year-old accountant has believed for 6 months that his coworkers are slightly shifting his desk items every night. He has no hallucinations, and his occupational functioning remains intact.Delusional disorder
  • A 28-year-old woman experiences an acute onset of auditory hallucinations and disorganized speech 3 days after a severe car accident, with all symptoms fully resolving within 2 weeks.Brief psychotic disorder
  • A 20-year-old student exhibits social withdrawal, flat affect, and fixed beliefs that the radio is speaking directly to him. These symptoms began 3 months ago and are ongoing.Schizophreniform disorder
  • A 31-year-old man has a 2-year history of hearing critical voices. He also experienced two distinct 1-month episodes of profound anhedonia and suicidality, but the voices persist even during months when his mood is entirely euthymic.Schizoaffective disorder

Answer

The scenarios match to Delusional disorder, Brief psychotic disorder, Schizophreniform disorder, and Schizoaffective disorder, respectively, based on exact symptom duration, associated mood correlations, and functional status.
Psychiatric diagnoses in the psychotic spectrum rely heavily on exact timelines and symptom combinations. Brief psychotic disorder lasts 1 day to 1 month. Schizophreniform disorder lasts 1 to 6 months. Schizophrenia requires at least 6 months of continuous disturbance. Schizoaffective disorder requires major mood episodes concurrent with schizophrenia criteria, plus at least 2 weeks of isolated psychosis. Delusional disorder involves greater than 1 month of non-bizarre or bizarre delusions without prominent hallucinations or functional decline.

Step-by-Step Solution

1
Analyze the exact duration of the primary psychotic symptoms in each clinical scenario.
The durations are 6 months, 2 weeks, 3 months, and 2 years. These timeframes differentiate acute, intermediate, and chronic psychotic conditions.
Timeframes are critical for distinguishing brief psychotic disorder (less than 1 month), schizophreniform disorder (1 to 6 months), and schizophrenia (greater than 6 months).
2
Evaluate the patient's functional status and the presence of other symptom categories like hallucinations or negative symptoms.
The 45-year-old accountant lacks hallucinations and retains full function, separating him from the schizophrenia spectrum.
Delusional disorder requires at least 1 month of delusions without meeting criteria for schizophrenia and without marked functional impairment.
3
Analyze the longitudinal relationship between mood symptoms and psychotic symptoms in chronic presentations.
The 31-year-old man has psychotic symptoms continuing even when his mood is completely euthymic for months.
Psychosis occurring for greater than 2 weeks without a major mood episode distinguishes schizoaffective disorder from a mood disorder with psychotic features.

Key Concept

Psychotic disorders are primarily differentiated by symptom duration (1 month, 6 months), the longitudinal relationship between mood and psychosis, and the presence or absence of marked functional decline.
Estimated Time:1m 30s
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Topics

Schizophrenia and Psychotic Disorders

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