Since the new adenocarcinoma (ADC) classification was presented in 2011, several authors have reported that patients with solid (S) and/or micropapillary (MP) predominant patterns showed a worse prognosis. On the other hand, there are several patients who have S and/or MP patterns even if their patterns are not predominant. However, the evaluation of these patients is uncertain.A total of 531 ADCs were examined. We classified the patients into five subgroups according to the proportion of S and/or MP patterns: (1) both patterns absent (S-/MP-), (2) S predominant (S pre), (3) MP predominant (MP pre), (4) S pattern present although not predominant and MP pattern absent (S+ not pre/MP-), and (5) MP pattern present although not predominant (MP+ not pre).Of the 531 ADCs, 384 (72.3

作者：Naoki, Yanagawa；Satoshi, Shiono；Masami, Abiko；Masato, Katahira；Mitsumasa, Osakabe；Shin-Ya, Ogata

来源：Journal of thoracic oncology : official publication of the International Association for the Study of Lung Cancer 2016 年 11卷 11期