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Future Testing Will Be Music to Patients' Ears

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WebMD Health News

June 1, 2000 -- A whole new generation of tests to diagnose disease is on the horizon. Some laboratory tests and imaging studies may even cost less than current alternatives, making early cancer detection a reality more often.

In response to consumer demand for cancer screening, imaging centers in Southern California are offering full-body CT scans (pronounced 'cat' scans and similar to an X-ray) for healthy people. "Most full-body scans just identify scar tissue and [noncancerous] growths, but invasive follow-up tests are often needed to rule out serious disease, says Deborah Baumgarten, MD, an associate professor of radiology at Emory University School of Medicine in Atlanta.

Full-body CT scans are not covered by managed care health plans, but new laboratory tests may soon be. As a low cost-screening tool, detection of genetic mutations holds promise for many cancers and requires just a few drops of blood, urine, and saliva. "In five years, [these] tests will be routine for common cancers," says co-developer David Sidransky, MD, professor of oncology and otolaryngology at Johns Hopkins University School of Medicine in Baltimore.

In diagnosing cancer, Sidransky tells WebMD that these new tests won't replace traditional testing, but will probably serve as a first step. A urine test for bladder cancer could be available within the next two years. Soon after, blood and saliva tests for lung, breast, prostate, and colon cancers will be available at a cost of about $200.

Until then, new approaches in bowel imaging are less invasive than traditional exams. Virtual colonoscopy allows doctors to see inside the colon without a scope inserted into the rectum. "Computer software turns a simple CT scan into a fantastic voyage of the colon," says Joseph Ferucci, MD, chairman of radiology at Boston Medical Center and professor of radiology at Boston University School of Medicine.

Virtual colonoscopy eliminates the risk of penetrating the bowel wall with the instruments and the need for sedation, but won't replace traditional colonoscopy for everyone. "If large pre-cancerous polyps are found, they'll have to be snared with a colonoscope," Ferucci tells WebMD. "But for most people, the virtual procedure is two thirds the cost of traditional colonoscopy and will ultimately be the price of a mammogram."

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