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Zorluk: ZorSchizophrenia and Psychotic Disorders

A 20-year-old man is brought to the university health clinic by his parents due to increasingly concerning behavior. The parents state that for the past 6 weeks, he has barricaded himself in his bedroom, claiming he can hear the voices of "federal agents" plotting to abduct him, and frequently shouting back at these unseen voices. When asked about his prior baseline functioning, his parents note that he was a highly sociable honors student until approximately 8 months ago. At that time, he began to progressively withdraw from his friends, stopped maintaining his personal hygiene, and displayed a markedly blunted affect. Concurrently, he began expressing vague theories about "sensing electromagnetic fields," which coincided with a severe decline in his academic performance leading to academic probation. His vital signs are within normal limits. A comprehensive metabolic panel and urine toxicology screen are unremarkable. Which of the following is the most likely diagnosis?

  1. A
    Brief psychotic disorder
  2. B
    Schizoaffective disorder
  3. SchizophreniaCevap
  4. D
    Schizophreniform disorder
  5. E
    Schizotypal personality disorder

Cevap

Schizophrenia
The correct diagnosis is schizophrenia. According to DSM-5 criteria, a diagnosis of schizophrenia requires the presence of active-phase symptoms (e.g., delusions, hallucinations, disorganized speech) for at least 1 month, alongside continuous signs of the disturbance lasting for a minimum of 6 months. Crucially, this 6-month requirement includes the prodromal, active, and residual phases of the illness. This patient has a 6-week history of active hallucinations and delusions, which was preceded by an approximately 6.5-month prodromal phase characterized by negative symptoms (blunted affect, social withdrawal, poor hygiene) and attenuated positive symptoms (odd beliefs about electromagnetic fields). Because the total duration of the disturbance is 8 months, the diagnostic threshold for schizophrenia is met.

Adım Adım Çözüm

1
Identify the active-phase psychotic symptoms and determine their duration.
The patient has auditory hallucinations and persecutory delusions that have been present for 6 weeks.
Establishing the duration of the active phase is necessary to meet Criterion A for psychotic disorders.
2
Identify any prodromal or residual symptoms and determine the total duration of the illness.
The patient experienced social withdrawal, blunted affect, declining hygiene, and odd beliefs starting 8 months ago. The total duration of the disturbance is therefore 8 months.
The total duration of all phases (prodromal + active + residual) is the primary metric used to differentiate between brief psychotic disorder, schizophreniform disorder, and schizophrenia.
3
Differentiate between the primary psychotic disorders based on the established timeline.
Because the active phase is > 1 month and the total illness duration is > 6 months, the clinical picture meets the criteria for schizophrenia.
Brief psychotic disorder is < 1 month total; schizophreniform disorder is 1 to 6 months total; schizophrenia is > 6 months total.

Anahtar Kavram

The 6-month minimum duration criterion for schizophrenia encompasses the entire disturbance, including the prodromal, active, and residual phases.
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Konular

Schizophrenia and Psychotic Disorders

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