Have any studies shown that testosterone replacement therapy lowers the incidence of prostate cancer in hypogonadal men, or is the evidence still largely neutral?  

This is a broad question to which I will give a broad answer.For men with hypogonadism (symptoms and signs of androgen deficiency, reproducibly low serum testosterone with an accurate, reliable assay) and no reversible cause, the epidemiological data overall do not show evidence of increased risk of...