What are the most common symptoms of schizoaffective disorder?

Mood and Psychosis. It is similar to bipolar d/o or major depression in terms of mood disturbance. The difference is, a person is psychotic during periods when their mood is stable. Schizoaffective d/o is either bipolar type or depressive type.
Schizoaffective. Schizoaffective disorder is an extremely serious illness that can be thought of as a combination of schizophrenic (psychosis) and bipolar disorder (the old term being manic depression) with involves extreme mood swings.