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Difficulty: MediumSchizophrenia and Psychotic Disorders

An emergency department physician evaluates a 29-year-old female patient after police found her wandering in traffic. The patient is highly agitated and states, "The angels are speaking to me, they say the end is coming!" Her sister arrives at the hospital and explains that the patient had been functioning perfectly normally until two weeks ago. At that time, the patient's house was destroyed in a severe fire, and she immediately began exhibiting disorganized speech and reporting auditory hallucinations. She has no prior history of mental illness, and she does not use alcohol or recreational drugs. Vital signs are within normal limits. A thorough medical workup reveals no metabolic, infectious, or neurologic abnormalities. Which of the following is the most likely diagnosis?

  1. Brief psychotic disorderAnswer
  2. B
    Schizophreniform disorder
  3. C
    Schizophrenia
  4. D
    Delusional disorder
  5. E
    Schizoaffective disorder

Answer

Brief psychotic disorder
The correct diagnosis is brief psychotic disorder. This condition is characterized by the sudden onset of psychotic symptoms (such as hallucinations, delusions, or disorganized speech) that last for at least 1 day but less than 1 month, eventually resolving completely. This patient's abrupt onset of auditory hallucinations and disorganized speech following a major trauma exactly two weeks ago perfectly meets these criteria.

Step-by-Step Solution

1
Analyze the patient's presenting psychiatric symptoms.
The patient exhibits prominent auditory hallucinations and disorganized speech.
Identifying the core symptoms is necessary to establish the presence of a primary psychotic disorder.
2
Determine the exact duration of the psychotic symptoms.
Collateral history from the sister confirms the symptoms began abruptly exactly two weeks ago following a severe stressor.
Symptom duration is the most critical factor for differentiating between acute psychotic diagnoses.
3
Compare the symptom profile and duration against DSM-5 criteria.
Symptoms lasting between 1 day and 1 month align with brief psychotic disorder. Diagnoses of schizophreniform disorder (1-6 months) and schizophrenia (>6 months) are ruled out.
Applying precise temporal criteria secures the correct diagnosis and prevents premature labeling of a lifelong psychotic illness.

Key Concept

The primary differentiating factor among brief psychotic disorder (<1 month), schizophreniform disorder (1-6 months), and schizophrenia (>6 months) is the total duration of the psychotic symptoms.
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Topics

Schizophrenia and Psychotic Disorders

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