[Transexual gender identity disorders: diagnostic and legal issues].

The current classification systems (ICD-10, DSM-IV), epidemiology, symptoms and diagnostic features of gender identity disorders are discussed. In the best interest of the patients, and in view of the legal situation, treatment has to follow set "standards of care". The necessity of a psychotherapeutically guided real life test, lasting at least 1 year before somatic treatment can begin, is again pointed out.