Positive EGFR mutation status is a risk of recurrence in pN0–1 lung adenocarcinoma when combined with pathological stage and histological subtype: A retrospective multi-center analysis

腺癌 医学 危险系数 内科学 阶段(地层学) 病态的 肿瘤科 突变 胃肠病学 癌症 病理 生物 基因 遗传学 置信区间 古生物学
作者
Masaoki Ito,Yoshihiro Miyata,Yasuhiro Tsutani,Hiroyuki Ito,Haruhiko Nakayama,Kentaro Imai,Norihiko Ikeda,Morihito Okada
出处
期刊:Lung Cancer [Elsevier BV]
卷期号:141: 107-113 被引量:41
标识
DOI:10.1016/j.lungcan.2020.01.018
摘要

Objectives: Recurrence risk of resected lung adenocarcinoma is represented by pathological stage (pStage), histological subtype, and potentially by EGFR mutation. However, the relationship among these factors and their combined impact on prognosis are unclear. Materials and Methods Using a multicenter database, we retrospectively investigated the prognostic impact of EGFR mutation status in relation to pStage and histological subtype in resected pN0–1M0 lung adenocarcinoma. Results Among 1155 pN0–1M0 adenocarcinoma cases, pStage 0 and IA1–IB were confirmed predominantly in EGFR-positive cases. AIS, MIA, and lepidic predominant adenocarcinoma were also more frequently found in EGFR-positive cases and showed no/little recurrence regardless of EGFR mutation status. The 5-year recurrence-free survival (RFS) of papillary, acinar, solid, and micropapillary predominant adenocarcinoma was stratified by pStage (IA1–IB, IIA–IIIA) or histological malignant subtype (intermediate or high malignant subtype), and more finely subdivided by EGFR mutation status. Positive EGFR mutation cases showed worse RFS in both classifications. Low malignant subtype and pStage IA1–IB intermediate malignant subtype showed low frequency of recurrence. Whereas, in pStage IA1–IB high malignant subtype and pStage IIA–IIIA cases, EGFR-positive cases showed poorer 5-year RFS than EGFR-negative (49.6% and 75.6%, respectively, hazard ratio [HR] = 1.84, 95% CI = 1.38–7.42, p < 0.01) and multivariate analysis indicated positive EGFR mutation status was significantly related to poorer PRF (HR = 2.005, 95% CI = 1.029–3.906, p = 0.041). Conclusion EGFR mutation harbored primarily in early-stage or low-malignant histological subtypes with no/little recurrence. In pN0–1M0 adenocarcinoma with higher risk of recurrence, positive EGFR mutation cases showed worse RFS. EGFR mutation status enables better stratification of recurrence risk when considering pStage and histological malignant subtype.
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