[Mulitple primary carcinomas.--Analysis and discussion of 74 cases (author's transl)]

This study is based on the examination of 3132 patients. 74 of these patients (2,6%) had clearly demonstrated multiple tumors. Most of them were located in the mamma, the female sex organs, the oral cavity and the pharynx as well as in the lymphatic and hematopoietic organs. A significantly greater risk to develop secondary carcinomas was found in patients suffering from primary mamma carcinomas. A correlation with other tumors of the female sex organs can also be supposed. In case of other malignant tumors, it was not possible to demonstrate any tendency to form secondary carcinomas. Important informations about pathogenesis and etiology of carcinomas can be obtained by the performance of detailed examinations which have to be based on reliable statistical methods.