What is etiologic relationship between schizophrenia spectrum disorders and bipolar affective disorder (manic-depressive illness)?

Updated: May 30, 2019
  • Author: Stephen Soreff, MD; Chief Editor: Glen L Xiong, MD  more...
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Using probands from the Maudsley Twin Register in London, Cardno and colleagues showed that schizophrenic, schizoaffective, and manic syndromes share genetic risk factors and that the genetic liability was the same for schizoaffective disorder as for the other 2 syndromes. [47] This finding suggests an independent genetic liability for psychosis shared by both mood and schizophrenia spectrum disorders, as Berrettini [48] previously speculated and that has been confirmed in the recent large-scale GWAS studies mentioned above. [17]

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