Psychosomatic disorders of delinquents are current clinical phenomena, but they are rarely examined and discussed. The contribution presents empirical-statistical results of a field-study with n = 202 unselected forensic patients in disciplinary measures. Psychosomatic diseases have been diagnosed in n = 48 cases. The interpretation of multi- and bivariate statistics hints at an iatrogene influence on detainees: Their psychosomatic disorders can be described as forms of autoplastic defence which must be considered in the context of specific basic personality structures and corresponding disturbed ego functions (control of impulses and anxiety, competence of communication and sublimation). This psychosomatic structure can be differentiated from perverse structured personalities. Characterised as an autoplastic and auto-aggressive reaction, the psychosomatic symptom can be distinguished from alloplastic and hetero-aggressive acting. Nevertheless these psychodynamics seem to be forensic-psychological predicators for anticipated delinquent relapses.