A clinico-pathological study on the correlation of immunosuppression and multiple primary malignant neoplasmas.

At present it is obvious that the incidence of second malignancies in patients with malignant diseases increases after prolonged treatment with immunosuppressive, or antineoplastic agents. The occurrence of such additional malignant diseases was analysed in our five-years autopsy material. During this period 7670 autopsies were performed. Malignant diseases were observed in 1707 cases (22.1%) and among them in 58 cases were proved multiple primary malignant neoplasms (3.3%). The average time between the occurrence of initial and second tumors was 29 months. The frequency of second tumors in patients with leukemias (mainly chronic lymphocytic leukemia) were four times higher than in patients with tumors of epithelial origin. Hepatocarcinomas arose in cirrhotic livers and astrocytomas were often followed by new malignancies. In consequence of successfully applied surgical, radiological and combined immunosuppressive, antineoplastic therapy the survival of cancer patients lengthened, so among different side-effects of the used therapy the oncogenesis cannot be left out of account. The danger of subsequent malignant tumors makes it imperative that immunosuppression should only be applied when strictly indicated.