Influence of stress and of endocrine imbalance on the experimental metastasis.

The influence of some stress agents applied during variable periods of time and under various modifications of the endocrine status was studied on the lymphotropic metastases of the 256 Walker carcinosarcoma, grafted intratesticulary in rats. Different reactivity of metastases, when compared to that of primary tumors was found in relation to the action of some compounds influencing the hormonal balance. Stress enhances the primary tumor development, while the metastatic growth is inhibited. However later on, sudden enhancement of the metastasis growth was observed. Adrenalectomy, as well as testosterone, thyroxine, of Stilbostat administration inhibit the metastasis, whereas cortisone, or antithyroid drug administration enhance the metastasis. The in vitro study of the tumor cell proliferation suggests some immunemorphological involvements in the development of this process.