One of the most important questions of our previous common volumes about affective, schizoaffective, and schizophrenic disorders was the question of what connects and what separates psychotic disorders (Marneros and Tsuang, Schizo affective Psychoses, Springer-Verlag, 1986; Marneros and Tsuang Affective and Schizoaffective Disorders, Springer-Verlag, 1990; Marneros, Andreasen, and Tsuang, Negative and Positive Schizophrenia, Springer-Verlag 1993). The boundaries between various psychotic d...

The psychotic symptoms of up to 30% of schizophrenic patients do not respond adequately to treatment with antipsychotic drugs, other than clozapine. These refractory patients are generally among the most disabled of all people with schizophrenia and require special assessment and treatment. This volume presents the latest research and recommendations on the definition, causes and therapy of treatment-resistant schizophrenia (TRS). Methods for identification and optimal management of TRS ar...