Since the weight of the normal prostate is about 20 g in adult males, a prostate weighing estimated to weight more than 20 g by ultrasonography is regarded as prostate swelling in our hospital. However, the weight of the prostate varies with age, and its measurements also vary. In this study, we examined the changes in the weigh) of the prostate with age in the groups with and without symptoms in the prostate. In the healthy males without prostatic symptoms, the estimated weight of the prostate was more than 20 g in males over 50 years old, and there were many patients in whom prostate swelling was observed without significant clinical symptoms. It was considered necessary to be aware of the changes in the prostate weight with age without adhering to a single standard weight, when performing ultrasonographic estimation of the prostate weight.
