Snippet from the abstract:
Androgenetic alopecia (AGA) is a genetically determined skin condition strongly age dependent and androgens are assumed to play an important role in its development. A link between AGA and prostate cancer has been hypothesized because of their similar risk factors.
We sought to systematically review the evidence available on the association between AGA and risk of prostate cancer.
We searched the electronic databases MEDLINE and Cochrane for studies examining the association between AGA and risk of prostate cancer. We estimated pooled odds ratios (OR) and 95% confidence intervals. We also analyzed the OR for individual hair loss patterns, as defined by the Hamilton scale.
Although many authors have investigated a possible association between androgenetic alopecia (AGA) and prostate cancer, there is not yet a definitive answer. Patients with any pattern genetic balding did not have an increased risk of prostate cancer, but patients with just vertex pattern AGA (crown balding without balding in other areas) had a significantly increased risk of prostate cancer versus control subjects. Vertex pattern AGA may be associated with an increased risk of prostate cancer.
In another publication, there was a higher risk of heart disease in patients with pure crown balding.