As of 2015, the PSA levels range chart is a guide that doctors previously commonly used to screen men for prostate cancer, reports the National Cancer Institute. The PSA levels range chart is controversial as prostate-specific antigen levels are not always indicative of cancer.
The PSA chart outlines parameters for amounts of the prostate-specific antigen in the blood used to test for prostate cancer, according to MedicineNet. The PSA levels range chart lists concentrations of PSA according to age and race. According to the parameters set by the PSA test, PSA levels of more than 4 nanograms per milliliter are irregular, and levels greater than 10 nanograms per milliliter indicate a high cancer risk.
As of 2015, this information is obsolete. Previously, doctors believed that PSA levels were indicative of cancer, yet there is no specific normal of abnormal level of PSA in the blood, states the National Cancer Institute. A PSA level of 4 nanograms per milliliter does not indicate prostate cancer or a lack of prostate cancer.
The National Cancer Institute also considers the PSA levels range chart controversial for other reasons, such as the likelihood of overtreatment. All detected tumors are not life-threatening, and treating benign tumors may cause more harm than good.