[Attenuated psychosis syndrome: A new diagnostic category for further study in DSM-5].

In recent years an increasing number of studies focus on the issue of early diagnosis and intervention. At the same time, a large number of special service units for early psychosis have been established around the world especially in Australia, USA, UK, Germany etc. Recently, similar units operate in Greece also. The Diagnostic Manual of Mental Disorders of the American Psychiatric Association in its latest edition in 2013 (DSM-5), introduced the category "Attenuated Psychosis Syndrome" (APS) for people with early psychotic experiences in the section: "Conditions for further study '. This new category has specific criteria and describes a situation, in which a person displays psychotic symptoms in an attenuated form, with quite unaffected reality testing, but not qualifying a diagnosis of schizophrenic spectrum. The clinical expression of APS should be differentiated with several well known psychiatric disorders such as: brief psychotic disorder, schizotypal personality disorder, major depression with psychotic features, adolescence adjustment disorders, drug use, etc. The "Attenuated Psychosis Syndrome" occurs mainly in adolescence and in young adulthood. The mean percentage of transition to psychosis for these individuals is estimated at 36%, three years after the onset of initial symptoms, while the risk of transition to psychosis, although smaller, seems to remain up to ten years later. For some other individuals, transition to other psychiatric disorders occurs, such as depression with psychotic elements, or bipolar disorder, while a significant number of them will not transmit to even more serious disorders. At the biological level, studies focused in brain's neuroimaging, suggest significant volumetric differences among people at high risk for psychosis who later develop psychosis compared to those who don't, while studies of psychophysiological indicators or / and genetic markers show promising results for the identification of relevant parameters indicating the transition to psychosis. Αlthough an heterogeneous population, people with APS, show significant difficulties in social, professional and cognitive level, that should be therapeutically addressed. In an attempt to improve the clinical status of these individuals, to delay or even to prevent a psychotic episode, a series of interventions have been used by psychiatrists. These interventions include: (a) administration of drugs, especially atypical antipsychotics or antidepressants in low dosage, (b) administration of non-pharmaceutical supplements (e.g. omega-3 ), (c) psychotherapeutic interventions, mainly cognitive behavior therapy and (d) a combination of the above. Many questions need to be answered such as, the period of therapeutic intervention, identification of indicators (biological or/and clinical) that may determine the most suited for the APS individuals therapeutic interventions or, that may foresee, to prevent the transition to psychosis. Thus, the continuation of research in populations of APS individuals in multiple levels is necessary.