How do Schizoaffective Disorder and mood disorders with psychotic features differ?

• A. Mood disorder with psychotic features has psychotic symptoms only during mood episodes.
• B. Schizoaffective requires psychotic symptoms for a substantial period without mood symptoms, plus mood episodes present for a significant portion of illness.
• C. They are the same disorder.
• D. Schizoaffective has no psychotic symptoms.

Answer: (B)

The key idea is how psychosis relates to mood symptoms across these disorders. In schizoaffective disorder, psychotic symptoms can occur even when mood symptoms are not present, and mood symptoms are also a prominent part of the illness. This means there must be a substantial period during which psychosis exists without a mood disturbance, while mood episodes are also present for a significant portion of the overall illness.

In mood disorders with psychotic features, the psychotic symptoms occur only during mood disturbances (depressive or manic episodes) and are not present in the absence of mood symptoms. So the defining contrast is whether psychosis can occur independently of mood symptoms.

That’s why the correct description emphasizes independent psychotic symptoms outside mood episodes plus mood symptoms that are prominent for much of the illness. The other statements either wrongly imply psychosis never occurs outside mood episodes, claim the disorders are the same, or state there is no psychosis, which don’t fit the diagnostic reality.