Personality development disorder  A personality development disorder is an inflexible and pervasive pattern of inner experience and behavior in children and adolescents, that markedly deviates from the expectations of the individual's culture. Personality development disorder is not recognized as a mental disorder in any of the medical manuals, such as the ICD-10 or the DSM-IV, nor the more recent DSM-5. DSM-IV allows the diagnosis of personality disorders in children and adolescents only as an exception. This diagnosis is currently proposed by a few authors in Germany. The term personality "development" disorder is used to emphasize the changes in personality development which might still take place and the open outcome during development. Personality development disorder is considered to be a childhood risk factor or early stage of a later personality disorder in adulthood. Adults usually show personality patterns over a long duration of time. Children and adolescents however still show marked changes in personality development. Some of these children and adolescents have a hard time developing their personalities in an ordinary way. DSM-IV states, for example, that children and adolescents are at higher risk to develop an antisocial personality disorder if they showed signs of conduct disorder and attention deficit disorder before the age of 10. This led Adam & Breithaupt-Peters (2010) to the idea that these children and adolescents need to be looked at more carefully. The therapy which these children and adolescents need might be more intense and maybe even different from looking at the disorders traditionally. The concept of personality development disorders also focuses on the severity of the disorder and the poor prognosis. An early diagnosis might help to get the right treatment at an early stage and thus might help to prevent a personality disorder outcome in adulthood. Similar to the adult diagnosis personality disorder these children display enduring patterns of inner experience and behavior deviating markedly from the expectations of the individual's culture. These patterns are inflexible and pervasive across a broad range of personal and social situations, lead to clinically significant distress or impairment in social, occupational or other important areas of functioning and they are stable and of long duration (more than a year). The term personality development disorder (Persönlichkeitsentwicklungsstörung) was first used in German by Spiel & Spiel (1987). Adam & Breithaupt-Peters (2010) adapted the term to a more modern concept and suggested the following definition. Similar to adult personality disorders there are multiple causes and causal interactions for personality development disorders. In clinical practice it is important to view the disorder multi-perspectively and from an individual perspective.