Non–small cell lung cancer is the most common type of lung cancer, usually growing and spreading more slowly than small cell lung cancer. -Lung cancer is the second most common cancer and the most common cause of cancer-related death in both men and women in the United States. In 2007, about 213,380 new cases of lung cancer (both small cell and non-small cell) are expected in the United States, and about 160,390 people will die of this disease. For most patients with non–small cell lung cancer, current treatments do not cure the cancer.
“With non–small cell lung cancer—since the relatively modest increase in survival must be balanced against the toxicity of the chemotherapeutic treatment—the case for monitoring therapeutic response is especially compelling,” said Nahmias. “To assess the response to chemotherapy in patients with advanced non–small cell lung cancer, all of the studies published thus far have evaluated the patients at one, or at most two, time points after the initiation of chemotherapy,” said Nahmias. “In our study, we evaluated 15 patients weekly—for seven weeks—as they started their chemotherapy regiment. In spite of the persuasive findings of several studies investigating PET for monitoring response to cancer therapy, until now no published reports have clearly demonstrated that PET results were used to alter treatment,” he noted.
PET is a powerful molecular imaging procedure that noninvasively demonstrates the function of organs and other tissues. When PET is used to image cancer, a radiopharmaceutical (such as FDG, which includes both a sugar and a radionuclide) is injected into a patient. Cancer cells metabolize sugar at higher rates than normal cells, and the radiopharmaceutical is drawn in higher amounts to cancerous areas. PET scans show where FDG is by tracking the gamma rays given off by the radionuclide tagging the drug and producing three-dimensional images of their distribution within the body. PET scanning provides information about the body’s chemistry, metabolic activity and body function.
“Our result—that PET studies one and three weeks after initiation of cancer therapy can predict success or failure of the therapy—should be validated in a larger study in which patients are enrolled with the intention of applying it in patient management,” said Nahmias. He added, “I am forever grateful to all the patients who came back week after week to undergo our PET scans.”
“Time Course of Early Response to Chemotherapy in Non–Small Cell Lung Cancer Patients With 18F-FDG PET/CT” appears in the May issue of the Journal of Nuclear Medicine, which is published by SNM, the world’s largest molecular imaging and nuclear medicine society. Other co-authors are Wahid T. Hanna, Misty J. Long, Karl F. Hubner and David W. Townsend, departments of Medicine and Radiology, University of Tennessee, Knoxville, and Lindi M. Wahl, Department of Applied Mathematics, University of Western Ontario, London, Canada.
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About SNM—Advancing Molecular Imaging and Therapy
SNM is holding its 54th Annual Meeting June 2–6 at the Washington Convention Center in Washington, D.C. Session topics for the 2007 meeting include brain amyloid imaging, hybrid imaging, molecular imaging in clinical drug development and evaluation, functional brain imaging in epilepsy and dementia, imaging instrumentation, infection imaging, lymphoma and thyroid cancer, cardiac molecular imaging, general nuclear medicine, critical elements of care in radiopharmacy and more.
SNM is an international scientific and professional organization of more than 16,000 members dedicated to promoting the science, technology and practical applications of molecular and nuclear imaging to diagnose, manage and treat diseases in women, men and children. Founded more than 50 years ago, SNM continues to provide essential resources for health care practitioners and patients; publish the most prominent peer-reviewed journal in the field (the Journal of Nuclear Medicine); host the premier annual meeting for medical imaging; sponsor research grants, fellowships and awards; and train physicians, technologists, scientists, physicists, chemists and radiopharmacists in state-of-the-art imaging procedures and advances. SNM members have introduced—and continue to explore—biological and technological innovations in medicine that noninvasively investigate the molecular basis of diseases, benefiting countless generations of patients. SNM is based in Reston, Va.; additional information can be found online at http://www.snm.org.
