Feature | January 13, 2010

Change in TMN Staging System Validated

January 13, 2010 – Research validates the efficacy of the recent reclassification of the T category in the International Association for the Study of Lung Cancer’s (IASLC) "Staging Manual in Thoracic Oncology" released in the January 2010 issue of the Journal of Thoracic Oncology.

In the sixth edition of the tumor, node and metastatis (TNM) staging system, there were no changes. Thus, the change in the seventh edition is significant as it is the first revision of TMN classification in lung cancer for 12 years, and represents the most drastic change there has been in the past 30 years.

The medical records of 1,393 patients with non-small cell lung cancer who underwent complete resection were thoroughly reviewed for pathologic findings and survival. The stage of all the patients was pathologically defined according to the present international staging system, previously revised in 1997. This study examined the relationship between the cut-off points of the tumor size for the new T category and the pathologic invasiveness

The TNM staging system is useful for both the clinical assessment of tumor progression and the determination of treatment plan, such as surgery, chemotherapy and radiation. In the forthcoming TNM classification, a revision with respect to lung cancer has been proposed by the International Association for the Study of Lung Cancer. The major revision is the T category, which makes an especially strict division by detailed cut points of tumor size (e.g., 2-, 3-, 5- and 7-cm). The proposed T revision has been determined and validated based on the overall survival date from a large international database.

The lead study author, Tokujiro Yano, M.D., called the new T classification, which is based mainly on the tumor size, “appropriate for the pathologic findings of the primary tumor.” The significant differences were observed among newly revised T subsets in at least one incidence of pathologic invasiveness, including lymphatic, vascular, or pleural invasion.

Past chair and author of the IASLC’s staging guide, Peter Goldstraw, added that IASLC will play a central role in the formation of future classification of TMN.

For more information: www.iaslcpubs.org/IASLC-Manual-Thoracic-print.html

Related Content

Accuray Launches Synchrony Motion Tracking and Correction Technology for Radixact System
Technology | Image Guided Radiation Therapy (IGRT) | April 24, 2019
Accuray announced the launch of its Synchrony motion tracking and correction technology to be used with the Radixact...
New Study Redefines Therapeutic Dose Guidelines for Non-Small Cell Lung Cancer
News | Lung Cancer | April 23, 2019
Non-small cell lung cancer is a common cancer for both men and women. Many people who are diagnosed with this type of...
Comparison of state Medicaid fees for radiation oncology services for breast cancer and nonradiation oncology services per the Kaiser Family Foundation Index

Fig. 1: Comparison of state Medicaid fees for radiation oncology services for breast cancer and nonradiation oncology services per the Kaiser Family Foundation Index. (Agarwal et al, Red Journal, 2019) Credit: Elsevier

News | Radiation Therapy | April 22, 2019
April 22, 2019 — A new study finds wide state
Stereotactic Radiosurgery Effective for Pediatric Arteriovenous Malformation Patients
News | Radiation Therapy | April 19, 2019
Ching-Jen Chen, M.D., of the neurosurgery department at the University of Virginia (UVA) Health System, was the winner...
Video Plus Brochure Helps Patients Make Lung Cancer Scan Decision

Image courtesy of the American Thoracic Society

News | Lung Cancer | April 19, 2019
A short video describing the potential benefits and risks of low-dose computed tomography (CT) screening for lung...
FDA Clears GE's Deep Learning Image Reconstruction Engine
Technology | Computed Tomography (CT) | April 19, 2019
GE Healthcare has received 510(k) clearance from the U.S. Food and Drug Administration (FDA) of its Deep Learning Image...
Surgically Guided Brachytherapy Improves Outcomes for Intracranial Neoplasms
News | Brachytherapy Systems | April 18, 2019
Peter Nakaji, M.D., FAANS, general practice neurosurgeon at Barrow Neurological Institute, presented new research on...
ASTRO Applauds Introduction of PIMA Patient Protection Bill
News | Radiology Business | April 15, 2019
The American Society for Radiation Oncology (ASTRO) hailed the introduction of federal legislation that would...
Gamma Knife radiosurgery has become the preferred radiation therapy option for patients with brain tumors at facilities like the Northwestern Medicine Cancer Center, pictured here

Gamma Knife radiosurgery has become the preferred radiation therapy option for patients with brain tumors at facilities like the Northwestern Medicine Cancer Center, pictured here. The technology is favored largely for its ability to precisely target tumors while sparing healthy tissue.

Feature | Radiation Oncology | April 11, 2019 | By Jeff Zagoudis
Brain tumors are some of the most complicated forms of cancer to treat due to their extremely sensitive location.
Varian Discloses First Preclinical Results of Flash Therapy in Cancer Treatment
News | Proton Therapy | April 09, 2019
Varian, in partnership with the University of Maryland School of Medicine’s Department of Radiation Oncology and the...