Their research was reported in the second issue of November 2005 of the American Journal of Respiratory and Critical Care Medicine, published by the American Thoracic Society.
Li Zong, Ph.D. of the Division of Pulmonary and Critical Care Medicine, Chandler Medical Center, University of Kentucky, Lexington, along with five associates, has identified five non-small cell lung cancer-associated antibody proteins that achieved 90 percent sensitivity and 95 percent specificity in identifying cancerous versus non-cancerous patient samples.
(Sensitivity indicates the probability that results will be positive when disease is present. Specificity identifies the probability that results will be negative when disease is absent.)
According to the U.S. National Cancer Institute, 160,000 people die each year from lung cancer, making it the number one cause of cancer death in America. Smoking is the primary cause of the disease.
The authors state that presently only 25 percent of new cases of lung cancer are diagnosed at an early stage, when curative surgery is possible.
"Serum tumor markers have the potential of being incorporated into diagnostic and therapeutic practice to improve historically dismal outcomes in non-small cell lung cancer," said Dr. Zong. "Potential uses include early detection or screening, differentiation of benign from malignant disease, differentiating histologies, defining stages and responses to therapy, and defining prognosis.
"These goals have generated considerable interest in identifying predictive tumor markers," Dr. Zong continues. "Although a number of non-small cell lung cancer tumor markers are measurable and a combination of markers can enhance diagnostic value, limited sensitivity and specificity of the
Contact: Suzy Martin
American Thoracic Society