Preoperative evaluation of T factor and N-factor in primary lung cancer.
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In 338 cases of surgically resected primary lung cancer from 1979 to 1984, preoperative evaluation of the T-factor and N-factor was performed in 2 groups, that is, one undergoing CT examination (CT (+)), the other was without CT examination (CT (-)).<BR>The accuracy of the T-factor was 83.3% for the p-T1 cases, 73.2% for the p-T2 cases, 71.2% for the p-T3 cases, and 74.9% overall. In the p-T1 cases the accuracy of the CT (+) group was higher than the CT (-) group, on the contrary, in p-T2 cases the accuracy of the CT (-) was higher than the CT (+) group.<BR>The main causes of mistaken evaluation of the T-factor were (1) error in measuring tumor diameter and (2) error in recognizing the presence or absence of invasion to adjacent organs. In the CT (+) group, there were fewer cases in which the T-factor was underestimated compared with the CT (-) group. On the other hand, there were more cases of overestimation.<BR>The diagnostic accuracy of the N-factor was 75.5% for the p-NO cases, 41.7% for the p-N1 cases, 48.9% for the p-N2 cases, and 62.4% overall.<BR>This was clearly inferior to the results for the T-factor.<BR>In the CT (+) group the accuracy of evaluation of N1 was less than the CT (-) group, but that of N2 was markedly increased.<BR>However, there were many cases overestimated because of swollen lymph nodes without metastasis in squamous cell carcinoma cases, and no improvement was noted in the diagnostic accuracy of the N-factor in the CT (+) group.<BR>The diagnostic accuracy of the CT (+) group was not neccesarily markedly better than the CT (-) group, in terms of either the T-factor or N-factor.
- 特定非営利活動法人 日本肺癌学会の論文
特定非営利活動法人 日本肺癌学会 | 論文
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