The familial trend of prostate carcinoma has been highlighted by a number of important studies in which the authors underlined the increased risk that brothers and sons of patients with this disease might be affected by prostate carcinoma. These studies also underline the importance of two significant risk factors in determining the presence of disease: early onset and number of relatives already affected. In this anamnestic-type survey of two sample groups, one with prostate carcinoma and the other a control group, the authors attempt to make a general confirmation of the assertions made by other authors. Even if based on a relatively small series of patients, the results of this study are fully comparable to those reported by other authors.