A study utilizing stored blood samples from 300 men has found that in 25% of the men with the highest levels of a hormone called insulin-like growth factor, prostate cancer was likely to occur four times more frequently than in the one-quarter of men with the lowest levels. The growth hormone is involved in regulation of the body’s development; in adults it helps regulate cell turnover. Implications for men’s health are that a blood test may identify those persons with high levels of the hormone as being at increased risk of cancer and that it might be possible to reduce the risk by giving drugs to lower the hormone’s levels.
(Source: Science, 1998; 278:2145-2150)