Psychotic Disorders US Medical PG Practice Questions and MCQs
Practice US Medical PG questions for Psychotic Disorders. These multiple choice questions (MCQs) cover important concepts and help you prepare for your exams.
Psychotic Disorders US Medical PG Question 1: A 26-year-old man is brought to the emergency department by his wife because of bizarre and agitated behavior for the last 6 weeks. He thinks that the NSA is spying on him and controlling his mind. His wife reports that the patient has become withdrawn and at times depressed for the past 3 months. He lost his job because he stopped going to work 4 weeks ago. Since then, he has been working on an invention that will block people from being able to control his mind. Physical and neurologic examinations show no abnormalities. On mental status examination, he is confused and suspicious with marked psychomotor agitation. His speech is disorganized and his affect is labile. Which of the following is the most likely diagnosis?
- A. Brief psychotic disorder
- B. Schizophreniform disorder (Correct Answer)
- C. Schizotypal personality disorder
- D. Schizophrenia
- E. Delusional disorder
Psychotic Disorders Explanation: ***Schizophreniform disorder***
- The patient's symptoms, including **delusions** (fixed false beliefs that the NSA is spying and controlling his mind), **disorganized speech**, and **agitated behavior**, are consistent with a psychotic disorder.
- The duration of active psychotic symptoms (6 weeks), which is more than 1 month but less than 6 months, fits the diagnostic criteria for **schizophreniform disorder**.
- The prodromal phase (withdrawn and depressed for 3 months) plus the active phase does not yet meet the 6-month requirement for schizophrenia.
*Brief psychotic disorder*
- This disorder is characterized by a sudden onset of psychotic symptoms lasting less than 1 month, followed by a full return to premorbid functioning.
- The patient's active psychotic symptoms have persisted for 6 weeks, exceeding the maximum duration for brief psychotic disorder.
*Schizotypal personality disorder*
- This disorder primarily involves a pervasive pattern of social and interpersonal deficits marked by acute discomfort with close relationships, as well as cognitive or perceptual distortions and eccentricities.
- While there might be odd beliefs or magical thinking, it does not typically involve the persistent and severe delusions and disorganized speech seen in this case.
- This is a personality disorder, not a psychotic disorder.
*Schizophrenia*
- Schizophrenia requires continuous signs of disturbance for at least 6 months, which includes at least 1 month of active-phase symptoms (delusions, hallucinations, disorganized speech).
- The patient's total duration of illness (3 months of prodromal symptoms plus 6 weeks of active symptoms) totals approximately 4.5 months, which is less than the 6-month minimum duration required for a diagnosis of schizophrenia.
*Delusional disorder*
- The primary feature of delusional disorder is the presence of one or more delusions for at least 1 month, without other prominent psychotic symptoms such as disorganized speech or behavior.
- This patient exhibits prominent **disorganized speech**, **labile affect**, and **disorganized behavior** (bizarre invention work), which are not characteristic of delusional disorder.
- Functioning is more impaired than typically seen in delusional disorder.
Psychotic Disorders US Medical PG Question 2: A 45-year-old obese man is evaluated in a locked psychiatric facility. He was admitted to the unit after he was caught running through traffic naked while tearing out his hair. His urine toxicology screening was negative for illicit substances and after careful evaluation and additional history, provided by his parents, he was diagnosed with schizophrenia and was treated with aripiprazole. His symptoms did not improve after several dosage adjustments and he was placed on haloperidol, but this left him too lethargic and slow and he was placed on loxapine. After several dosage adjustments today, he is still quite confused. He describes giant spiders and robots that torture him in his room. He describes an incessant voice screaming at him to run away. He also strongly dislikes his current medication and would like to try something else. Which of the following is indicated in this patient?
- A. Haloperidol
- B. Olanzapine
- C. Chlorpromazine
- D. Fluphenazine
- E. Clozapine (Correct Answer)
Psychotic Disorders Explanation: ***Clozapine***
- This patient has **treatment-resistant schizophrenia**, indicated by a lack of response to multiple trials of antipsychotics, including aripiprazole (atypical), haloperidol (typical), and loxapine (atypical).
- **Clozapine** is the only antipsychotic proven effective for treatment-resistant schizophrenia, significantly reducing psychotic symptoms and suicidality.
*Haloperidol*
- Haloperidol is a **first-generation antipsychotic** that the patient has already tried and found to be too sedating and slow.
- Continuing with haloperidol would likely result in persistent side effects and inadequate symptom control given his prior negative experience.
*Olanzapine*
- Olanzapine is a **second-generation atypical antipsychotic**; however, it is not typically indicated as a first-line treatment for treatment-resistant schizophrenia after failure of multiple agents.
- While effective for schizophrenia, it would be less effective than clozapine in a patient who has failed several previous antipsychotic trials.
*Chlorpromazine*
- Chlorpromazine is a **first-generation antipsychotic** that carries a higher risk of sedation, extrapyramidal symptoms, and anticholinergic side effects.
- It is unlikely to be more effective than haloperidol, which the patient already found too sedating and slow, and would not be the preferred choice for treatment-resistant schizophrenia.
*Fluphenazine*
- Fluphenazine is a **first-generation antipsychotic** with potent dopamine D2 receptor blockade, often leading to significant extrapyramidal side effects.
- Like other first-generation antipsychotics, it is not indicated as the next step for treatment-resistant schizophrenia after failure of multiple trials.
Psychotic Disorders US Medical PG Question 3: A 24-year-old man is brought to your emergency department under arrest by the local police. The patient was found naked at a busy intersection jumping up and down on top of a car. Interviewing the patient, you discover that he has not slept in 2 days because he does not feel tired. He reports hearing voices. The patient was previously hospitalized 1 year ago with auditory hallucinations, paranoia, and a normal mood. What is the most likely diagnosis?
- A. Schizophrenia
- B. Bipolar disorder
- C. Brief psychotic disorder
- D. Schizotypal disorder
- E. Schizoaffective disorder (Correct Answer)
Psychotic Disorders Explanation: ***Schizoaffective disorder***
- This patient demonstrates the **hallmark feature** of schizoaffective disorder: **psychotic symptoms occurring both during AND independent of mood episodes**.
- **Current presentation**: Clear **manic episode** (decreased need for sleep, grandiose/disinhibited behavior, psychomotor agitation) with psychotic features (auditory hallucinations).
- **Previous hospitalization**: **Psychotic symptoms (hallucinations, paranoia) in the absence of a mood episode** ("normal mood"), requiring hospitalization for at least 2 weeks - this is the **key diagnostic criterion** for schizoaffective disorder.
- The diagnosis requires an **uninterrupted period of illness** with both psychotic symptoms (meeting Criterion A for schizophrenia) and a major mood episode, PLUS psychotic symptoms for **≥2 weeks without prominent mood symptoms**.
*Bipolar disorder*
- In bipolar disorder with psychotic features, psychotic symptoms occur **exclusively during mood episodes** (manic, hypomanic, or depressive).
- This patient's previous hospitalization with psychosis but **"normal mood"** indicates psychotic symptoms independent of mood episodes, which **rules out** bipolar disorder and points to schizoaffective disorder.
- While the current presentation shows mania with psychosis, the longitudinal course is critical for diagnosis.
*Schizophrenia*
- Schizophrenia involves **continuous psychotic symptoms** without prominent mood episodes dominating the clinical picture.
- This patient has **prominent manic symptoms** (decreased sleep, grandiose behavior, agitation) that are central to the current presentation, making schizophrenia less likely.
- The presence of full mood episodes that occupy a **substantial portion** of the illness duration favors schizoaffective disorder over schizophrenia.
*Brief psychotic disorder*
- Brief psychotic disorder involves psychotic symptoms lasting **<1 month** with full return to baseline functioning.
- This patient has a **recurrent course** with hospitalization 1 year ago, indicating a chronic/recurring condition rather than a brief, self-limited episode.
*Schizotypal disorder*
- This is a **personality disorder** characterized by social deficits, cognitive/perceptual distortions, and eccentric behavior, but **NOT overt psychotic episodes**.
- Does not involve acute psychotic breaks with severe symptoms like hallucinations requiring hospitalization or manic episodes.
Psychotic Disorders US Medical PG Question 4: A 21-year-old man presents to the emergency room requesting surgery to remove "microchips," which he believes were implanted in his brain by "Russian spies" 6 months ago to control his thoughts. He also reports hearing the "spies" talk to each other through embedded "microspeakers." You notice that his hair appears unwashed and some of his clothes are on backward. Urine toxicology is negative for illicit drugs. Which of the following additional findings are you most likely to see in this patient during the course of his illness?
- A. Anhedonia, guilty rumination, and insomnia
- B. Grandiose delusions, racing thoughts, and pressured speech
- C. Asociality, flat affect, and alogia (Correct Answer)
- D. Amnesia, multiple personality states, and de-realization
- E. Intrusive thoughts, ritualized behaviors, and anxious mood
Psychotic Disorders Explanation: ***Asociality, flat affect, and alogia***
- This patient exhibits **delusions (persecutory, control)** and **auditory hallucinations**, classic positive symptoms of **schizophrenia**. The question asks about findings "during the course of his illness," which points to the **typical progression of schizophrenia**: patients initially present with **positive symptoms** (as seen in this case) and **over time develop negative symptoms** such as **asociality** (lack of motivation to engage in social interaction), **flat affect** (reduced emotional expression), and **alogia** (poverty of speech).
- The disorganized appearance (unwashed hair, clothes on backward) already demonstrates **disorganized behavior**, part of the schizophrenia spectrum. Negative symptoms typically emerge or worsen as the illness progresses, representing the most likely additional findings.
*Anhedonia, guilty rumination, and insomnia*
- While **anhedonia** and **insomnia** can be seen in schizophrenia, their presence alongside prominent **guilty rumination** would more strongly suggest a **depressive disorder with psychotic features**, rather than primary schizophrenia, especially with the patient's specific, classic psychotic symptoms.
- The primary symptoms described (delusions of control, auditory hallucinations) are more characteristic of primary psychotic disorders, and guilty rumination is not a typical feature of schizophrenia progression.
*Grandiose delusions, racing thoughts, and pressured speech*
- These symptoms are hallmark features of **mania** or a **manic episode with psychotic features**. While psychotic features can occur in bipolar disorder with mania, the patient's specific delusions of being controlled by spies and hearing voices discussing him are more typical of schizophrenia.
- The absence of information about elevated mood, increased energy, or decreased need for sleep also makes mania less likely compared to schizophrenia.
*Amnesia, multiple personality states, and de-realization*
- These symptoms are characteristic of **dissociative disorders**. **Amnesia** and **multiple personality states** (now known as identity alteration in dissociative identity disorder) involve disturbances in memory and identity.
- **De-realization** involves feelings of unreality regarding one's surroundings. None of these align with the patient's primary presentation of well-formed delusions and hallucinations characteristic of a psychotic disorder.
*Intrusive thoughts, ritualized behaviors, and anxious mood*
- These are core features of **obsessive-compulsive disorder (OCD)**. The patient's symptoms are clearly defined as delusions (fixed false beliefs) and hallucinations (perceptions without external stimuli), which are distinct from the ego-dystonic intrusive thoughts and ritualistic compulsions of OCD.
- While anxiety may be present in psychotic disorders, the primary presentation here is not dominated by OCD-like symptoms, and these would not be expected to develop as part of schizophrenia's natural course.
Psychotic Disorders US Medical PG Question 5: A 27-year-old man presents to the emergency department for bizarre behavior. The patient had boarded up his house and had been refusing to leave for several weeks. The police were called when a foul odor emanated from his property prompting his neighbors to contact the authorities. Upon questioning, the patient states that he has been pursued by elves for his entire life. He states that he was tired of living in fear, so he decided to lock himself in his house. The patient is poorly kempt and has very poor dentition. The patient has a past medical history of schizophrenia which was previously well controlled with olanzapine. The patient is restarted on olanzapine and monitored over the next several days. Which of the following needs to be monitored long term in this patient?
- A. CBC
- B. HbA1c levels (Correct Answer)
- C. ECG
- D. Monitoring for acute dystonia
- E. Renal function studies
Psychotic Disorders Explanation: ***HbA1c levels***
- **Olanzapine** is associated with significant metabolic side effects, including **weight gain**, **dyslipidemia**, and **new-onset diabetes mellitus**, necessitating long-term monitoring of **glucose metabolism**
- **HbA1c** provides an average of blood glucose levels over the past 2-3 months, making it an excellent indicator for assessing the risk and progression of **diabetes** in patients on olanzapine.
*CBC*
- While some antipsychotics can cause hematological side effects like **agranulocytosis** (e.g., **clozapine**), **olanzapine** is not typically associated with severe bone marrow suppression requiring routine, long-term CBC monitoring.
- CBC monitoring would be more relevant in the short-term if there were specific concerns for infection or adverse drug reactions.
*ECG*
- Some atypical antipsychotics can prolong the **QTc interval**, which would warrant ECG monitoring, but this adverse effect is less commonly associated with **olanzapine** compared to other antipsychotics like **ziprasidone** or **haloperidol**.
- While a baseline ECG might be considered, long-term routine ECG monitoring is not typically indicated without specific cardiac risk factors or symptoms.
*Monitoring for acute dystonia*
- **Acute dystonia** is an extrapyramidal symptom that typically occurs early in treatment with antipsychotics, especially first-generation agents or at the initiation of therapy with second-generation agents like **olanzapine**.
- While important to monitor acutely, it is not a long-term monitoring requirement once the patient is stable on the medication.
*Renal function studies*
- **Olanzapine** is primarily metabolized by the liver, and **renal excretion** plays a minor role in its elimination.
- Therefore, long-term monitoring of renal function is not routinely recommended for patients on olanzapine unless there are pre-existing kidney conditions or other nephrotoxic medications.
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