A physician-validated, board-style question from the Active Transport QBank. Try it, then check the reasoning for every option.
A 24-year-old man is brought to the doctor’s office by his mother because the patient believes aliens have begun to read his mind and will soon have him performing missions for them. The patient’s mother says that the delusions have been intermittently present for periods of at least 1-month over the past year. When he is not having delusions, she says he still lacks expression and has no interest in socializing with his friends or going out. He has no past medical history and takes no prescription medications. The patient has smoked 1 pack of cigarettes daily for the past 10 years. Since the disturbance, he has not been able to maintain employment and lives at home with his mother. His vitals include: blood pressure 124/82 mm Hg, pulse 68/min, respiratory rate 14/min, temperature 37.3°C (99.1°F). On physical examination, the patient exhibits poor eye contact with a flat affect. His speech is circumferential, land he is currently experiencing bizarre delusions. The results from a urine drug screen are shown below:
Amphetamine negative
Benzodiazepine negative
Cocaine negative
GHB negative
Ketamine negative
LSD negative
Marijuana negative
Opioids negative
PCP negative
Which of the following is the correct diagnosis?
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A
Schizotypal personality disorderIncorrect. Schizotypal personality disorder features odd beliefs, magical thinking, and eccentric behavior, but NOT frank delusions or psychotic episodes. This patient has bizarre delusions, which exceeds schizotypal.
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B
SchizophreniaCorrect. Schizophrenia requires ≥6 months of disturbance with ≥1 month of active-phase symptoms plus negative symptoms (flat affect, social withdrawal) — exactly this patient's year-long course.
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C
Schizoaffective disorderIncorrect. Schizoaffective disorder requires a concurrent major mood episode (mania or major depression). This patient has no described mood episode.
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D
Schizoid personality disorderIncorrect. Schizoid personality disorder features detachment and restricted emotional range but NOT delusions. Schizoid patients prefer solitude rather than experiencing psychosis.
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E
Brief psychotic disorderIncorrect. Brief psychotic disorder requires symptoms lasting <1 month with full return to premorbid functioning. This patient's symptoms have persisted over a year with ongoing negative symptoms, exceeding the brief psychotic disorder timeframe.
↑ Tap an answer to reveal the reasoning
Answer: B. This patient meets DSM-5 criteria for schizophrenia: at least 1 month of active-phase symptoms (delusions, disorganized speech) with continuous signs of disturbance — including negative symptoms (flat affect, anhedonia, social withdrawal) — for at least 6 months. He has had intermittent delusional episodes "over the past year" plus persistent negative symptoms between episodes, and significant occupational/social impairment. The negative urine drug screen rules out substance-induced psychosis.
The critical distinction from schizoaffective disorder is the absence of a mood episode (major depression or mania). The distinction from schizophreniform disorder is the duration (≥6 months for schizophrenia vs 1-6 months for schizophreniform). The personality disorder distractors fail because personality disorders, by definition, do not involve frank psychosis or delusions during active episodes.
First-line treatment is a second-generation antipsychotic (e.g., risperidone, olanzapine), typically paired with psychosocial interventions and family education. Lifelong management is usually required.
**Why each option:**
**A.** Schizotypal personality disorder features odd beliefs, magical thinking, and eccentric behavior, but NOT frank delusions or psychotic episodes. This patient has bizarre delusions, which exceeds schizotypal.
**B.** Schizophrenia requires ≥6 months of disturbance with ≥1 month of active-phase symptoms plus negative symptoms (flat affect, social withdrawal) — exactly this patient's year-long course.
**C.** Schizoaffective disorder requires a concurrent major mood episode (mania or major depression). This patient has no described mood episode.
**D.** Schizoid personality disorder features detachment and restricted emotional range but NOT delusions. Schizoid patients prefer solitude rather than experiencing psychosis.