аЯрЁБс>ўџ 8:ўџџџ7џџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџџьЅС5@ јПџbjbjЯ2Я2 "$­X­XџџџџџџџˆВВВВВВВЦNNNNbЦоh‚(ЊЊЊЊЊЊЊ]______$FR˜*ƒВе ЊЊе е ƒВВЊЊ˜c c c е LВЊВЊ]c е ]c c o :+,ВВГЊv д{‘бўЧN! W IЎ0оaRТ+ .ТГЦЦВВВВГ"ТВеtЊZ @c D 4x ]ЊЊЊƒƒЦЦЄjфY ЦЦjDonohoe MT. Scans or scams: The facts behind whole body scans. Lake Oswego Review 2005 (June 23):A7 (editorial). To the Editor, Lake Oswego Review Scanning or Scamming? I was dismayed to find an insert in this week’s Lake Oswego Review from Ultra Life, offering “real time color ultrasound” of various organs, or for those inclined, a $500 “full body scan.” Companies offering such services tend to market in areas of higher socioeconomic status. They prey on people’s fears of heart disease and cancer and on their natural desire to detect such problems early, in hopes of achieving a cure, or at least avoiding potentially disfiguring or toxic therapies. The public is enamored of such tests: a recent survey found that 85% of American adults would prefer to receive a free whole body CT scan instead of $1000 cash. Before rushing out to purchase such tests, readers should consider the following information about screening, so that they can make informed decisions: Screening for any disease, that is finding the disease in its pre-symptomatic stages, must meet certain criteria before being recommended: The disease being screened must be reasonably common and have a significant effect on either the duration or quality of one’s life. An acceptable, effect treatment must exist, and the condition must have an asymptomatic period during which detection and treatment can improve outcomes. Treatment during the asymptomatic period must be superior to treatment once symptoms occur. The screening test must be safe, affordable, and have adequate sensitivity (i.e., the test is usually positive in those who have the disease) and specificity (the test is usually negative in those who do not have the disease). Certain types of screening meet these criteria including: Blood pressure monitoring for those over age 21 to allow early treatment to help prevent heart attack and stroke. Cholesterol tests for those age 35 to 65 (also for heart attack and stroke prevention). Pap smears to check for cervical cancer and its precursors. Chlamydia testing for sexually active women to prevent transmission of this usually asymptomatic sexually transmitted disease, pelvic inflammatory disease, infertility, and chronic pelvic pain. Mammograms every year for those age 50 and over (some say age 40 and over) for early diagnosis of breast cancer. Regrettably, these well-established screening tests are underutilized, especially among non-Caucasians, those of lower socioeconomic status, and those with inadequate or no health insurance. Before considering a full body scan or other non-proven screening test, one should realize that these tests carry significant risks. False positive tests are extremely common among those with no signs of symptoms of disease – such alarming, yet incorrect, test results can cause significant anxiety, put one’s future insurability at risk, and lead to further, more invasive (and dangerous) testing. For example, screening all current and former smokers in the United States for lung cancer with a CT scan would identify more than 180 million lung nodules, the vast majority of which would be benign. Nevertheless, millions of patients with nodules would needlessly undergo invasive needle lung biopsies and/or removal of parts of their lungs, resulting in many cases of impaired breathing, lung collapse, heavy bleeding, infection, and even death. If that is not enough, whole body CT scans can actually cause cancer by exposing patients to radiation doses equivalent to those associated with elevated cancer risks in survivors of the Hiroshima atomic bombing. Of course, this is not meant to imply that one should avoid necessary diagnostic CT scans of particular organs, which are commonly ordered by physicians and can be lifesaving. When it comes to preventing heart disease, stroke and cancer, the best advice is quite simple: eat right, exercise, don’t smoke, drink only in moderation, have a regular physical exam, and obtain recommended screening tests and vaccines at appropriate intervals. If everyone did this, I and many of my colleagues would, quite happily I believe, go out of business. 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