Boston (SmartAboutHealth) - According to a recent study, as much as two of every five men whose cancer was caught via PSA screening tests have tumors too slow-growing to ever be a threat.

The work “reinforces the message that we are overdiagnosing prostate cancer,” said Dr. Len Lichtenfeld of the American Cancer Society, who was not involved in the study.

Cancer Society states that more than 186,000 U.S. men will be diagnosed with prostate cancer this year and nearly 29,000 will die as a result.

The study which tracked prostate cancer in U.S. men aged between 54 and 80 between 1985 and 2000 showed that 23 to 42 percent of PSA-detected cancers would have never been detected in the man’s lifetime.

The study by researchers at Erasmus University Medical Center in the Netherlands was published online Tuesday by the Journal of the National Cancer Institute.