The greater part the research for the elaboration of this thesis found its sources in the laws, jurisprudence, authorities and scattered studies of forensic doctors, judges and United States experts in psychology, psychiatry, urology and endocrinology. They are all unanimous in emphasizing the complexity of the matter in view of the insufficient knowledge to face it, the repetition of the cases and the almost inexistence of adequate solutions therefor. In a society such as the one in which we presently live, where everybody claims for his rights, rather than claiming for the respect for the rights of others, where the irresponsibility is the governing rule, where the escape to the purely personal pleasures is a common place, which has no perspectives for the future and thus, is not concerned with anything that exceeds its immediate needs, men turn to the only thing that really matters, which is their mental development, in the belief that the mental health means the destruction of inhibitions and the never ending celebration of the ego. They attribute to sex values that are not inherent thereto and all claim now for solutions to their problems which, in this incessant pendular movement, become confusing and certainty thereon. But, while facing this present social disorders, the society is imperatively called upon to present solutions to the emergent problems and to establish their limits. In fact, the society, through its judicial organs, is called upon to present a solution for the problems of the transsexuals. This egocentric society, adherent to the principle of absolute freedom, is in some countries acting like some parents who, in order to obviate their children's continuous demands and wishes, make unreasonable concessions with the sole purpose of escaping from further pressure put upon them. Thus, there are granted to an annoying group some concessions under the form of law which allow them to change their name and sex in the Public Records, close the eyes for the reassignment surgery and, as a consequence, create an army of eunuchs, whose mental and moral problems continue unresolved. Because the individuals under examination, in our opinion, suffer from mental and personality disorders which are in the border line between the neurosis and the psychosis. The psychoanalysts acknowledge their inability to cure such disorders and do not consider such individuals as victims of mental illnesses. But, it may be argued, what is the extension of such psychological knowledge? Couldn't it be deficient? It is our opinion that every possible medical treatment should be made available to such individuals, but without ever accepting the reassignment surgery, which would be the fatal point of no return. Therefore, laws should be enacted, defining as a crime any act of mutilation, practiced either by the individual himself or by a third party - the doctor -, both of them being liable therefore. And, furthermore, prohibiting the alterations of Public Records.