Question 1: Schizophnenia
Question:
A 25-year-old man is brought to a psychiatrist by his family due to concerns about his behavior over the past year. He reports hearing voices commenting on his actions and believes that the government is monitoring his thoughts through hidden cameras in his home. He has withdrawn socially, has difficulty maintaining employment, and exhibits disorganized speech. There is no history of substance use or medical conditions that could explain his symptoms. What is the most likely diagnosis?
A) Schizoaffective disorder
B) Schizophrenia
C) Delusional disorder
D) Brief psychotic disorder
Correct Answer:
B) Schizophrenia
Explanation:
Schizophrenia is diagnosed when an individual experiences symptoms such as delusions, hallucinations, disorganized speech, disorganized or catatonic behavior, or negative symptoms (e.g., affective flattening, alogia, avolition) for at least six months, with at least one month of active-phase symptoms. This patient presents with auditory hallucinations (voices commenting), delusions (government monitoring), disorganized speech, and social/occupational dysfunction, meeting the criteria for schizophrenia.
- A) Schizoaffective disorder involves both schizophrenia symptoms and mood episodes (major depressive or manic), which are not described in this case.
- C) Delusional disorder is characterized by persistent delusions but lacks significant hallucinations, disorganized speech, or negative symptoms.
- D) Brief psychotic disorder lasts less than one month, whereas schizophrenia requires at least six months of symptoms.
Thus, the most appropriate diagnosis is schizophrenia.
Question 2: Schizoaffective Disorder
A 32-year-old woman presents to a psychiatrist with a history of paranoid delusions and auditory hallucinations that have persisted for two years. She also experiences episodes of major depression, during which she has low energy, difficulty concentrating, and feelings of worthlessness. The depressive symptoms have been present for several months at a time and have occurred alongside the psychotic symptoms. However, she has also experienced at least two weeks of hallucinations and delusions in the absence of mood symptoms. What is the most likely diagnosis?
A) Major depressive disorder with psychotic features
B) Schizophrenia
C) Schizoaffective disorder
D) Bipolar I disorder
Correct Answer: C) Schizoaffective disorder
Explanation:
Schizoaffective disorder involves symptoms of schizophrenia (e.g., delusions, hallucinations) with concurrent mood episodes (major depressive or manic episodes). However, to differentiate it from mood disorders with psychotic features, the psychotic symptoms must persist for at least two weeks in the absence of mood symptoms. This distinguishes schizoaffective disorder from major depressive disorder or bipolar disorder with psychotic features, where psychosis only occurs during mood episodes.
- A) Major depressive disorder with psychotic features: Psychotic symptoms would only be present during depressive episodes, but in this case, psychosis persists beyond mood episodes.
- B) Schizophrenia: This disorder does not require mood episodes, whereas the patient in this case has prolonged depressive episodes.
- D) Bipolar I disorder: Requires manic episodes, which are not described here.
Thus, schizoaffective disorder is the most appropriate diagnosis.
Question 3: Delusional Disorder
A 45-year-old man believes that his neighbor is spying on him and trying to poison his food. He has no history of hallucinations, disorganized thinking, or negative symptoms. He is otherwise functioning well, maintaining his job and social life, although he avoids interactions with his neighbor. His beliefs have persisted for over a year, and he refuses to consider that they may not be true. What is the most likely diagnosis?
A) Schizophrenia
B) Paranoid personality disorder
C) Delusional disorder
D) Brief psychotic disorder
Correct Answer: C) Delusional disorder
Explanation:
Delusional disorder is characterized by one or more delusions lasting at least one month, with no other prominent psychotic symptoms (e.g., hallucinations, disorganized speech, or negative symptoms). The individual can generally function well in daily life aside from the impact of the delusions. In this case, the patient has a fixed paranoid delusion (believing his neighbor is spying and poisoning him) but lacks the broader impairment seen in schizophrenia.
- A) Schizophrenia: Would include additional symptoms such as hallucinations, disorganized speech, or significant social/occupational dysfunction.
- B) Paranoid personality disorder: Involves general distrust and suspicion but does not feature fixed delusions.
- D) Brief psychotic disorder: Would last less than one month, while this case has lasted over a year.
Thus, the best diagnosis is delusional disorder.
Question 4: Brief Psychotic Disorder
A 28-year-old woman experiences intense stress after losing her job and breaking up with her fiancé. A few days later, she begins hearing voices and believing she has been chosen by a divine entity to reveal hidden truths to the world. She is also disorganized in her speech and behavior. After three weeks, her symptoms resolve completely, and she returns to her normal level of functioning. What is the most likely diagnosis?
A) Brief psychotic disorder
B) Schizophreniform disorder
C) Schizophrenia
D) Bipolar I disorder with psychotic features
Correct Answer: A) Brief psychotic disorder
Explanation:
Brief psychotic disorder is diagnosed when psychotic symptoms (hallucinations, delusions, disorganized speech/behavior) last between one day and one month, with full recovery afterward. This case fits the criteria, as the woman had a sudden onset of psychotic symptoms following a major stressor, and her symptoms resolved within three weeks.
- B) Schizophreniform disorder: Lasts 1 to 6 months, whereas this case lasted less than a month.
- C) Schizophrenia: Requires at least six months of symptoms.
- D) Bipolar I disorder with psychotic features: Would involve manic episodes, which are not present here.
Thus, the most appropriate diagnosis is brief psychotic disorder.
Question 5: Schizophreniform Disorder
A 22-year-old college student is brought to a psychiatrist by his parents due to concerning behavioral changes over the past four months. He has been experiencing auditory hallucinations, paranoid delusions, and disorganized speech. His academic performance has declined, and he has withdrawn socially. There is no history of substance use or medical conditions that could explain his symptoms. What is the most likely diagnosis?
A) Schizophrenia
B) Schizoaffective disorder
C) Schizophreniform disorder
D) Brief psychotic disorder
Correct Answer: C) Schizophreniform disorder
Explanation:
Schizophreniform disorder is diagnosed when schizophrenia-like symptoms (hallucinations, delusions, disorganized speech, negative symptoms, etc.) persist for more than one month but less than six months. This disorder is often considered an intermediate diagnosis before schizophrenia is confirmed if symptoms persist beyond six months.
- A) Schizophrenia: Requires symptoms to last at least six months, whereas this case is only four months long.
- B) Schizoaffective disorder: Requires significant mood symptoms (e.g., major depressive or manic episodes) alongside psychosis, which are not present here.
- D) Brief psychotic disorder: Lasts less than one month, whereas this case has lasted four months.
Thus, the most appropriate diagnosis is schizophreniform disorder.
Simon R. Downes 