Abstract
In 68 men with benign prostatic hyperplasia, we evaluated the association between obesity and prostatic enlargement, as well as changes in serum levels of oestradiol, testosterone, dihydroepiandrosterone and dihydroepiandrosterone sulphate. Despite the larger adenomas, no increase in the symptom score for BPH was observed with increasing obesity. Average specimen weights increased with increasingly obesity and increasing host age from 46 to 80 g. We also found the serum oestradiol level significantly elevated in obese men who were 140% or over recommended weight compared to underweight men younger than 60 years (51.3 pg/ml versus 26.8 pg/ml, p < 0.01). This pattern was present in all age groups. These results indicate that obesity is a risk factor for prostatic enlargement but not for obstruction. Also the degree of obesity appears to have a direct effect on oestradiol levels through transformation of androgens in adipose tissue to oestrogens. In conclusion, further studies to evaluate the pathogenesis, pathophysiology, natural history and symptomatology of BPH would be of great interest and should help to define better the associations that we have recognized.
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