The authors sum up some basic knowledge concerning transsexualism (F 6
4.0 according to ICD -10). They deal with the definition of this disor
der, with differential diagnostics, psychosexual development of transs
exuals, differences between female-to-male and male-to-female patients
and at the end with the treatment of this disorder, stressing the the
rapeutic model applied in the Czech Republic above all. According to t
heir opinion the surgical change of sex leads to an increase in qualit
y of life of transsexual patients in indicated cases.