Clinical Staging System on TNM Classification for Lung Cancer:Results of Field Study

概要

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Case records of histologically proven 1, 827 patients with lung cancer were submitted for analysis for the purpose of the establishment of TNM staging on a basis of a prospective field study which was carried out cooperatively at 107 participating institutions in Japan during the period 1967 to 1969.<BR>An analysis of 1, 827 cases according to the existing TNM staging showed validity of the system. Whereas, when 1, 014 cases of stage 111 were divided into two groups; 450 cases with intrathoracic spread and 564 M1 cases, there noted definite statistical difference (P<0.001) between two groups. It is, therefore, considered that M1 group should be separated from the existing stage III and stage IV should be designated as a new stage.<BR>As to the ranking of T1N1M0, wheather it would be in stage I or in stage II, was seemed justifiable to put it into stage II was our impression.
特定非営利活動法人日本肺癌学会の論文