[Simultaneous occurrence of adenocarcinoma of the prostate in a father and son]

We describe two cases of adenocarcinoma of the prostate, which deserve being commented because of the unusual features of their occurrence. These were two stage D2 adenocarcinomas discovered within one year in a father and his son. One of the tumors was identified following hemostatic disorders. Thus three aspects of carcinoma of the prostate are studied: their possible occurrence in younger patients, the paraneoplastic disorders of coagulation, and the familial forms.