[Genetic risk of mental illness: what do we know and how do we communicate this?].

Insights from psychiatric genetics research and large international psychiatric genetics consortia are promising but still remain outside the realm of clinical practice.
AIM: To provide an overview of developments in the field of psychiatric genetics; and to offer guidance for health professionals how to assess and manage clinical implications of these developments.
METHOD: In this review, we address: recent developments in psychiatric genetics, with a focus on polygenic risk scores (PRS); ethical dilemmas associated with clinical application of PRS; and basic principles of genetic counseling for psychiatric disorders.
RESULTS: PRS are not yet ready for implementation in clinical practice because of limited predictive value and poor generalizability. In addition, it is still unclear how genetic risk and PRS can be communicated clearly to patients and families.
CONCLUSION: Advances in psychiatric genetics and increased availability of genetic risk scores may lead to questions from patients and families coping with psychiatric illness. These questions may be best addressed using psychiatric genetic counseling techniques. We recommend that psychiatrists have some basic knowledge of psychiatric genetics and know how to refer their patients to a clinical geneticist. Implementing a psychiatric genetics theme in training and education may be helpful.
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