Obama has been a long time smoker, and it's time to quit. His family history of cancer has made him attempt to quit many times, but without success. Cancer does run in Obama's family: His mother died of ovarian cancer and his maternal grandfather died of prostate cancer. Also, black men are at increased risk of prostate cancer overall — so the two factors typically prompt doctors to begin prostate screening, called a PSA exam, in the 40s. Scheiner listed Obama's PSA last year at a very low 0.6, meaning no sign of abnormalities.
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