Navigation Links
National study shows CT screening of former, current smokers reduces lung cancer deaths
Date:11/5/2010

WASHINGTON, DC A large national study finds that screening current or former heavy smokers with a CT scan can reduce deaths from lung cancers by 20 percent. One potential reason for the reduction is that the scan can pick up tumors at an early stage. The study was conducted by the National Cancer Institute at 33 centers around the country including Georgetown Lombardi Comprehensive Cancer Center, a part of Georgetown University Medical Center.

The National Lung Screening Trial (NLST) involved more than 53,000 current and former heavy smokers ages 55 to 74. More than 1,800 men and women participated through Lombardi. The study compared the effects of two screening procedures for lung cancer -- low-dose helical computed tomography (CT) and standard chest X-ray.

Under Lombardi's leadership, 1,800 men and women were recruited into the clinical trial at Georgetown University Hospital as well as two other Georgetown community screening locations.

"Overall this study provides strong evidence that older patients who are at high-risk of developing lung cancer could benefit from CT screening and that's a significant finding." says Claudine Isaacs, MD, lead investigator of the NLST study at Lombardi. "We are grateful to all the men and women who participated in this important study. Clinical trials are critical to making progress in medicine."

"These results are very encouraging," says Louis Weiner, MD, director of Lombardi. "Studies like these generate so much excitement, but clearly there is much more work to be done. Lombardi and other NCI-cancer centers continue to explore effective ways to reduce lung cancer deaths including prevention efforts and by conducting clinical trials with the newest available cancer fighting drugs."

The NLST study began enrolling participants in August 2002. Participants were required to have a smoking history of at least 30 pack-years and were either current or former smokers without signs, symptoms, or history of lung cancer. Pack-years are calculated by multiplying the average number of packs of cigarettes smoked per day by the number of years a person has smoked.

The men and women were randomly assigned to receive three annual screens with either low-dose helical CT (often referred to as spiral CT) or standard chest X-ray. Helical CT uses X-rays to obtain a multiple-image scan of the entire chest during a 7 to 15 second breath-hold. A standard chest X-ray requires only a sub-second breath-hold but produces a single image of the whole chest in which anatomic structures overlie one another. Previous efforts to demonstrate that standard chest X-ray examinations can reduce lung cancer mortality have been unsuccessful.

The trial participants received their screening tests at the time of enrollment and at the end of their first and second years on the trial. The participants were then followed for up to another five years; all deaths were documented, with special attention given to the verification of lung cancer as a cause of death. As of October 20, 2010, a total of 354 deaths from lung cancer had occurred among participants in the CT arm of the study, whereas a significantly larger 442 lung cancer deaths had occurred among those in the chest X-ray group. This represents a 20.3 percent reduction in lung cancer mortality offered by CT scans compared to the X-ray group.

"Potentially, we could save thousands of lives with CT screening, but keep in mind that because smoking causes many lung cancers, we could save hundreds of thousands more if people wouldn't smoke or quit if they do," Isaacs points out.

"We're proud to be a part of this important study designed to answer critical questions," says Howard J. Federoff, MD, PhD, executive vice president for health sciences at GUMC and executive dean of its School of Medicine. "Lombardi's leadership role in the effort to reduce the burden of cancer has an impact at the national and local levels, and benefits our community directly."

"This large and well-designed study used rigorous scientific methods to test ways to prevent death from lung cancer by screening patients at especially high risk," said Harold Varmus, M.D., NCI Director, in a press release issued today. "Lung cancer is the leading cause of cancer mortality in the U.S. and throughout the world, so a validated approach that can reduce lung cancer mortality by even 20 percent has the potential to spare very significant numbers of people from the ravages of this disease."

The NCI notes that the possible disadvantages of helical CT include the cumulative effects of radiation from multiple CT scans; surgical and medical complications in patients who prove not to have lung cancer but who need additional testing to make that determination; and risks from additional diagnostic work-up for findings unrelated to potential lung cancer, such as liver or kidney disease. In addition, the screening process itself can generate suspicious findings that turn out not to be cancer in the vast majority of cases, producing significant anxiety and expense. These problems must, of course, be weighed against the advantage of a significant reduction in lung cancer mortality.


'/>"/>

Contact: Karen Mallet
km463@georgetown.edu
215-514-9751
Georgetown University Medical Center
Source:Eurekalert

Related medicine news :

1. NationalCreditReport.com Reminds Consumers of Ways to Improve Credit Report and Score in 2010
2. The National Coalition for Cancer Survivorship Joins the Commission on Cancer
3. National Wildlife Federation Says Outdoor Time for Kids Can Help First Lady Achieve Her “Let's Move” Goal
4. Howard Dean to Speak at the 2010 DTC National Conference
5. International Diabetes Federation awards $2 million to 9 global diabetes research projects
6. Jion Beijing Great Wall International Travel Agency Immediate Exposure to China Expo 2010
7. U.S. National Guard Connects Nationwide with Desktop Alert's Command and Control Mass Notification Systems and Common Alerting Protocol (CAP)
8. H1N1 international symposium to be hosted by Emory-UGA Influenza Center
9. The Alliance for a Healthier Generation Names Celtics Captain Paul Pierce National Athlete Spokesperson in the Fight Against Childhood Obesity
10. Researchers Who Discovered First Genes for Stuttering will Present Findings to the National Stuttering Association
11. Protecting patients: Study shows that Johns Hopkins flu vaccination rates twice national average
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... (PRWEB) , ... June 25, 2016 , ... Austin residents ... the American College of Mohs Surgery and to Dr. Russell Peckham for medical and ... highly effective treatment for skin cancer. The selective fellowship in Mohs Micrographic Surgery completed ...
(Date:6/25/2016)... ... ... First Choice Emergency Room , the largest network of independent freestanding emergency ... its new Mesquite-Samuell Farm facility. , “We are pleased to announce Dr. Ogunleye ... M. Muzzarelli, Executive Medical Director of First Choice Emergency Room. , Dr. Ogunleye ...
(Date:6/25/2016)... ... ... On Friday, June 10, Van Mitchell, Secretary of the Maryland Department of ... recognition of their exemplary accomplishments in worksite health promotion. , The Wellness at Work ... Symposium at the BWI Marriott in Linthicum Heights. iHire was one of 42 businesses ...
(Date:6/24/2016)... ... , ... Those who have experienced traumatic events may suffer from a complex ... as drug or alcohol abuse, as a coping mechanism. To avoid this pain and ... a traumatic event. , Trauma sufferers tend to feel a range of emotions, from ...
(Date:6/24/2016)... ... June 24, 2016 , ... The ... in Dallas that it will receive two significant new grants to support its ... PHA marked its 25th anniversary by recognizing patients, medical professionals and scientists for ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... HILL, N.C. , June 24, 2016 /PRNewswire/ ... healthcare decisions and regulators/payers have placed more emphasis ... new environment, patient support programs in the pharmaceutical ... for patients, medications. Consequently, pharmaceutical companies are focusing ... ensure they are providing products and services that ...
(Date:6/24/2016)... 24, 2016 Research and ... "Structural Electronics 2015-2025: Applications, Technologies, Forecasts" report ... In-Mold Electronics, Smart Skin, Structural Health Monitoring, ... Structural electronics involves electronic and/or electrical components ... replacing dumb structures such as vehicle bodies or ...
(Date:6/24/2016)... PUNE, India , June 24, 2016 ... "Pen Needles Market by Type (Standard Pen Needles, Safety ... 12mm), Therapy (Insulin, GLP-1, Growth Hormone), Mode of Purchase ... published by MarketsandMarkets, This report studies the market for ... is expected to reach USD 2.81 Billion by 2021 ...
Breaking Medicine Technology: