PAGE 24 • February 2020
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Preventive Medicine by DR. BARRY
To PSA Or Not To PSA Here I go again, taking on another major important national healthcare guideline. … Both the United States Preventive Task Force and the American Academy of Family Practitioners recommend AGAINST using the PSA as a screening test. The American Cancer Society recommends that men only be offered PSA testing after a discussion of the risks and harms. Who is spending that much time with their doctor? Directly from the American Society of Clinical Oncology comes the following information: “Prostate cancer is the most common cancer among men, except for skin cancer. This year, an estimated 174,650 men in the United States will be diagnosed with prostate cancer. Around 60% of cases are diagnosed in men over 65. The average age of diagnosis is 66 years. The disease rarely occurs before age 40. Most prostate cancers (90%) are found when the disease is in only the prostate and nearby organs. This is referred to as the local or regional stage. The 5-year survival rate tells you what percent of men live at least 5 years after the cancer is found. Percent means how many out of 100. The 5-year survival rate for most men with local or regional prostate cancer is nearly 100%. For men diagnosed with prostate cancer that has spread to other parts of the body, the 5-year survival rate is 30%. Prostate cancer is the second leading cause of cancer death in men in the United States. It is estimated that 31,620 deaths from this disease will occur this year.” Interestingly enough, Prostate Specific Antigen (PSA) —which means a protein that is specific to prostate tissue— was first used by the police starting in 1966 when it was identified in semen and came to be used in cases of sexual assault. Then in 1979 it was discovered that this protein could be found in low amounts in the blood stream of men. PSA was first used in diagnosing prostate cancer in 1987 and was approved by the FDA for this purpose 7 years later. For years the PSA was done at your annual physical and if it was elevated you were
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sent for a biopsy to see if you have cancer. If you did test positive you are offered a choice between watching, radiation, surgery or hormonal treatment. Not everyone with an elevated PSA will have a positive biopsy. PSA levels rise as you age and bike riding, rectal probing, prostate irritation or infection can also raise the PSA. We have established a cutoff of 4.0 as the upper limit of normal but some people age normalize the number
Prostate cancer is the second leading cause of cancer death in men in the United States. It is estimated that 31,620 deaths from this disease will occur this year.” so as you get older up to 6.0 is considered normal. I have personally had patients with a PSA of 3 who had cancer (their prior PSA was less than 1 so the level of 3 was quite a jump) and patients with a level of 30 who did not have cancer. (They had a biopsy and it was just due to a very enlarged prostate.) So, your doctor CAN do a PSA test at your annual physical but some doctors, blindly following the guidelines, have abandoned this practice. Why? Because some researchers believe that the PSA does more harm than good because: 1. Some prostate cancers are slow growing and should be left alone. 2. There will be many people who have an elevated PSA who have biopsies that come back normal and they have been put through psychological stress needlessly. There are dangers of biopsy as well including infection, etc. 3. Some people will be overly aggressive about treating slow growing cancers and have operations or treatments that leave them with incontinence and sexual dysfunction.
