Which feature is essential for diagnosing schizoaffective disorder and distinguishes it from schizophrenia?

Which feature is essential for diagnosing schizoaffective disorder and distinguishes it from schizophrenia?

• A. Absence of hallucinations.
• B. A major mood episode concurrent with active-phase symptoms.
• C. Lack of negative symptoms.
• D. Short duration of illness.

Answer: (D)

Schizoaffective disorder is defined by a substantial mood component occurring with psychotic symptoms, along with a period of psychosis without mood symptoms. The crucial distinction from schizophrenia is the presence of a major mood episode (depressive or manic) that overlaps with active psychotic symptoms, plus at some point having psychotic symptoms without a concurrent mood episode. This mood–psychosis overlap is what sets schizoaffective apart from schizophrenia and from mood disorders with psychotic features (where psychosis occurs only during mood episodes). The duration of illness itself isn’t the defining factor, so a short illness duration isn’t what makes this diagnosis. The option describing a mood episode concurrent with active-phase symptoms best captures the essential feature.

Schizoaffective disorder is defined by a substantial mood component occurring with psychotic symptoms, along with a period of psychosis without mood symptoms. The crucial distinction from schizophrenia is the presence of a major mood episode (depressive or manic) that overlaps with active psychotic symptoms, plus at some point having psychotic symptoms without a concurrent mood episode. This mood–psychosis overlap is what sets schizoaffective apart from schizophrenia and from mood disorders with psychotic features (where psychosis occurs only during mood episodes). The duration of illness itself isn’t the defining factor, so a short illness duration isn’t what makes this diagnosis. The option describing a mood episode concurrent with active-phase symptoms best captures the essential feature.