Examkin

Question

Difficulty: EasySchizophrenia and Psychotic Disorders

A 28-year-old man is brought to the psychiatric clinic by his spouse. Over the past 3 weeks, the patient has slept only 2 hours per night, spoken at an unusually rapid pace, and claimed he is on the verge of single-handedly solving the global energy crisis. He also reports hearing the voices of angels who provide him with daily guidance. The spouse confirms this is his third episode of this nature in the past five years. Crucially, the spouse notes that even between these highly energetic episodes, during periods when the patient's mood is completely stable and normal for several months at a time, he continues to hear the angels' voices and firmly believes he possesses supernatural powers. A comprehensive medical and toxicological workup is negative. Which of the following is the most likely diagnosis?

  1. Schizoaffective disorderAnswer
  2. B
    Bipolar I disorder with psychotic features
  3. C
    Schizophrenia
  4. D
    Schizophreniform disorder
  5. E
    Brief psychotic disorder

Answer

Schizoaffective disorder
The most likely diagnosis is schizoaffective disorder. This condition is defined by an uninterrupted period of illness during which there is a major mood episode (manic or depressive) concurrent with active-phase symptoms of schizophrenia (such as delusions or hallucinations). The crucial defining feature that separates it from a primary mood disorder with psychotic features is the timeline criterion: the patient must experience delusions or hallucinations for 2 or more weeks in the strict absence of a major mood episode. Because this patient continues to experience auditory hallucinations and delusions for several months while his mood is completely stable, he strictly meets the criteria for schizoaffective disorder.

Step-by-Step Solution

1
Identify the patient's clinical symptoms.
The patient exhibits signs of a manic episode (decreased need for sleep, rapid speech, grandiosity) as well as psychotic symptoms (auditory hallucinations, delusions).
Establishing the presence of both mood and psychotic domains is the first step in differentiating the diagnosis.
2
Determine the temporal relationship between the mood symptoms and the psychotic symptoms.
The psychotic symptoms persist for several months even when the patient's mood is completely stable (euthymic).
The timeline criterion (psychosis occurring in the absence of a mood episode for at least 2 weeks) is the definitive differentiator between a primary psychotic disorder and a mood disorder.
3
Select the diagnosis that perfectly matches this specific timeline pattern.
Schizoaffective disorder is the only condition characterized by prominent mood episodes accompanied by an underlying, independent psychotic illness.
Bipolar disorder with psychotic features would require the psychosis to resolve when the mania resolves.

Key Concept

Differentiating schizoaffective disorder from bipolar disorder with psychotic features based on the presence of psychotic symptoms during euthymic periods.
Rate this question

Topics

Schizophrenia and Psychotic Disorders

More questions from this topic