Identical Twins Concordant for the Progression of Affective Illness to Schizophrenia

Abstract
Summary: A pair of identical twins for whom long-term follow-up information was available progressed concordantly from typical ‘affective illness' to process schizophrenia. We discuss a possible genetic basis for a certain form of schizophrenia which may present typical affective features in the initial phase of process schizophrenia.