"Meanwhile, the fellas age 40 and over eligible for the free screenings will receive more extensive testing than they can now get through their doctors. "

" Men ages 40 and older can stop by one of the mobile clinics for the free, private prostate cancer testing and physical exam. For the full week's screening sites and schedule, visit "

"* Co-sponsored by Northwestern Memorial Hospital, from 10 a.m. to 6 p.m. at Trinity Church, 425 Laurel Ave., Highland Park. The vehicle will be set up in the parking lot at 420 Central Ave."

"* Co-sponsored by the University of Chicago Medical Center, from 9 a.m. to 5 p.m., at the University of Chicago campus, 5841 S. Maryland Ave. The vehicle will be set up at the cul-de-sac at 58th Street and Ellis Street."

"Chicagoans will be the first to participate in the widespread human trial of the new test. It's part of an effort to combat a disease that afflicts one in six men and kills 27,000 in the United States annually but, when caught early, has a 99 percent survival rate. "

"Research conducted by Dr. William Catalona, who runs the prostate cancer program at Northwestern Memorial Hospital, pioneered the use of the current Complex PSA blood test. He also developed the Pro-PSA blood test and is leading the new research. "

"The current Complex PSA test measures the amount of prostate-specific antigen, or PSA, in the blood. The higher the PSA level, the greater the likelihood of prostate cancer. But the test has its drawbacks. Cancer isn't the only thing that can drive up PSA levels. Inflammation and noncancerous enlargement of the prostate can cause a spike in PSA. So the test can lead to so-called "false negatives" and "false positives" -- meaning sometimes it will miss cancer when it is present or indicate cancer
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