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Early lung cancer detection
Date:10/5/2010

Researchers from Northwestern University and NorthShore University HealthSystem (NorthShore) have developed a method to detect early signs of lung cancer by examining cheek cells in humans using pioneering biophotonics technology.

"By examining the lining of the cheek with this optical technology, we have the potential to prescreen patients at high risk for lung cancer, such as those who smoke, and identify the individuals who would likely benefit from more invasive and expensive tests versus those who don't need additional tests," said Hemant K. Roy, M.D., director of gastroenterology research at NorthShore.

The optical technique is called partial wave spectroscopic (PWS) microscopy and was developed by Vadim Backman, professor of biomedical engineering at Northwestern's McCormick School of Engineering and Applied Science. Backman and Roy earlier used PWS to assess the risk of colon and pancreatic cancers, also with promising results.

The lung cancer findings are published online today (Oct. 5) by the journal Cancer Research. The paper will appear in print in the Oct. 15 issue.

Lung cancer is the leading cause of cancer deaths in the United States. Survival rates are high with surgical resection (removal of the tumor) but only if detected at an early stage. Currently there are no recommended tests for large population screening to detect lung cancer early. The disease is already advanced by the time most lung cancer patients develop symptoms. The five-year survival rate for lung cancer patients is only 15 percent.

PWS can detect cell features as small as 20 nanometers, uncovering differences in cells that appear normal using standard microscopy techniques. The PWS-based test makes use of the "field effect," a biological phenomenon in which cells located some distance from the malignant or pre-malignant tumor undergo molecular and other changes.

"Despite the fact that these cells appear to be nor
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Contact: Megan Fellman
fellman@northwestern.edu
847-491-3115
Northwestern University
Source:Eurekalert

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