The IASLC Lung Cancer Staging Project: Background Data and Proposals for the Application of TNM Staging Rules to Lung Cancer Presenting as Multiple Nodules with Ground Glass or Lepidic Features or a Pneumonic Type of Involvement in the Forthcoming Eighth Edition of the TNM Classification
Frank C Detterbeck, Edith M Marom, Douglas A Arenberg, Wilbur A Franklin, Andrew G Nicholson, William D Travis, Nicolas Girard, Peter J Mazzone, Jessica S Donington, Lynn T Tanoue, Valerie W Rusch, Hisao Asamura, Ramón Rami-Porta, IASLC Staging and Prognostic Factors Committee, Advisory Boards, Multiple Pulmonary Sites Workgroup, Peter Goldstraw, Ramón Rami-Porta, Hisao Asamura, David Ball, David G Beer, Ricardo Beyruti, Vanessa Bolejack, Kari Chansky, John Crowley, Frank Detterbeck, Wilfried Ernst Erich Eberhardt, John Edwards, Françoise Galateau-Sallé, Dorothy Giroux, Fergus Gleeson, Patti Groome, James Huang, Catherine Kennedy, Jhingook Kim, Young Tae Kim, Laura Kingsbury, Haruhiko Kondo, Mark Krasnik, Kaoru Kubota, Antoon Lerut, Gustavo Lyons, Mirella Marino, Edith M Marom, Jan van Meerbeeck, Alan Mitchell, Takashi Nakano, Andrew G Nicholson, Anna Nowak, Michael Peake, Thomas Rice, Kenneth Rosenzweig, Enrico Ruffini, Valerie Rusch, Nagahiro Saijo, Paul Van Schil, Jean-Paul Sculier, Lynn Shemanski, Kelly Stratton, Kenji Suzuki, Yuji Tachimori, Charles F Thomas Jr, William Travis, Ming S Tsao, Andrew Turrisi, Johan Vansteenkiste, Hirokazu Watanabe, Yi-Long Wu, Paul Baas, Jeremy Erasmus, Seiki Hasegawa, Kouki Inai, Kemp Kernstine, Hedy Kindler, Lee Krug, Kristiaan Nackaerts, Harvey Pass, David Rice, Conrad Falkson, Pier Luigi Filosso, Giuseppe Giaccone, Kazuya Kondo, Marco Lucchi, Meinoshin Okumura, Eugene Blackstone, Jeremy Erasmus, Douglas Flieder, Myrna Godoy, Jin Mo Goo, Lawrence R Goodman, Jim Jett, Paul de Leyn, Alberto Marchevsky, Heber MacMahon, David Naidich, Morohito Okada, Marina Perlman, Charles Powell, Paul van Schil, Ming S Tsao, Arne Warth, Frank C Detterbeck, Edith M Marom, Douglas A Arenberg, Wilbur A Franklin, Andrew G Nicholson, William D Travis, Nicolas Girard, Peter J Mazzone, Jessica S Donington, Lynn T Tanoue, Valerie W Rusch, Hisao Asamura, Ramón Rami-Porta, IASLC Staging and Prognostic Factors Committee, Advisory Boards, Multiple Pulmonary Sites Workgroup, Peter Goldstraw, Ramón Rami-Porta, Hisao Asamura, David Ball, David G Beer, Ricardo Beyruti, Vanessa Bolejack, Kari Chansky, John Crowley, Frank Detterbeck, Wilfried Ernst Erich Eberhardt, John Edwards, Françoise Galateau-Sallé, Dorothy Giroux, Fergus Gleeson, Patti Groome, James Huang, Catherine Kennedy, Jhingook Kim, Young Tae Kim, Laura Kingsbury, Haruhiko Kondo, Mark Krasnik, Kaoru Kubota, Antoon Lerut, Gustavo Lyons, Mirella Marino, Edith M Marom, Jan van Meerbeeck, Alan Mitchell, Takashi Nakano, Andrew G Nicholson, Anna Nowak, Michael Peake, Thomas Rice, Kenneth Rosenzweig, Enrico Ruffini, Valerie Rusch, Nagahiro Saijo, Paul Van Schil, Jean-Paul Sculier, Lynn Shemanski, Kelly Stratton, Kenji Suzuki, Yuji Tachimori, Charles F Thomas Jr, William Travis, Ming S Tsao, Andrew Turrisi, Johan Vansteenkiste, Hirokazu Watanabe, Yi-Long Wu, Paul Baas, Jeremy Erasmus, Seiki Hasegawa, Kouki Inai, Kemp Kernstine, Hedy Kindler, Lee Krug, Kristiaan Nackaerts, Harvey Pass, David Rice, Conrad Falkson, Pier Luigi Filosso, Giuseppe Giaccone, Kazuya Kondo, Marco Lucchi, Meinoshin Okumura, Eugene Blackstone, Jeremy Erasmus, Douglas Flieder, Myrna Godoy, Jin Mo Goo, Lawrence R Goodman, Jim Jett, Paul de Leyn, Alberto Marchevsky, Heber MacMahon, David Naidich, Morohito Okada, Marina Perlman, Charles Powell, Paul van Schil, Ming S Tsao, Arne Warth
Abstract
Introduction: Application of tumor, node, and metastasis (TNM) classification is difficult in patients with lung cancer presenting as multiple ground glass nodules or with diffuse pneumonic-type involvement. Clarification of how to do this is needed for the forthcoming eighth edition of TNM classification.
Methods: A subcommittee of the International Association for the Study of Lung Cancer Staging and Prognostic Factors Committee conducted a systematic literature review to build an evidence base regarding such tumors. An iterative process that included an extended workgroup was used to develop proposals for TNM classification.
Results: Patients with multiple tumors with a prominent ground glass component on imaging or lepidic component on microscopy are being seen with increasing frequency. These tumors are associated with good survival after resection and a decreased propensity for nodal and extrathoracic metastases. Diffuse pneumonic-type involvement in the lung is associated with a worse prognosis, but also with a decreased propensity for nodal and distant metastases.
Conclusion: For multifocal ground glass/lepidic tumors, we propose that the T category be determined by the highest T lesion, with either the number of tumors or m in parentheses to denote the multifocal nature, and that a single N and M category be used for all the lesions collectively-for example, T1a(3)N0M0 or T1b(m)N0M0. For diffuse pneumonic-type lung cancer we propose that the T category be designated by size (or T3) if in one lobe, as T4 if involving an ipsilateral different lobe, or as M1a if contralateral and that a single N and M category be used for all pulmonary areas of involvement.
Keywords: Lung cancer; Lung cancer staging; Multiple tumors; Non–small cell lung cancer; TNM classification.
Copyright © 2016 International Association for the Study of Lung Cancer. Published by Elsevier Inc. All rights reserved.
Source: PubMed