[The phenomenon of covert self-mutilation in the surgical routine].

Factitious disorders are conditions which are unknown to many physicians but have a prevalence of 1-5 % in outpatient departments and hospitals. In order to avoid prolonged and complicated (false) treatment in surgery this article gives a review of the definition, epidemiology and pathogenesis of factitious disorders as well as clinical symptoms and therapy options. A focus is placed on the identification of patients, treatment strategies and the prevention of malpractice. Additionally, clinical features of the disorder are illustrated with the description of some characteristic cases.