Application of Lepidic Component Predominance to Adjuvant Chemotherapy with Oral Fluoropyrimidines for Stage I Lung Adenocarcinoma.

Abstract:

BACKGROUND:In the present study we aimed to investigate whether the predominance of the lepidic component in tumors was associated with the outcome of postoperative adjuvant chemotherapy for stage I lung adenocarcinoma. PATIENTS AND METHODS:Charts for patients with pathological stage I lung adenocarcinoma were retrospectively reviewed and then outcomes of adjuvant chemotherapy were assessed according to the lepidic component predominance in tumors. Prognostic factors were evaluated using a Cox proportional hazard model. Propensity scores were determined using the optimal matching method on the basis of Cox modeling and matched (1:1) analysis was applied after classification into lepidic and nonlepidic predominant tumors. RESULTS:Among 798 patients with stage I lung adenocarcinoma, 168 received adjuvant chemotherapy. Although adjuvant chemotherapy conferred no disease-free survival (DFS) advantage upon patients with lepidic predominant tumors, it improved DFS in T1b and T2a nonlepidic predominant tumors (P = .045 and P = .029, respectively). Propensity score matched analysis revealed no survival benefits of adjuvant oral fluoropyrimidines in lepidic predominant tumors (DFS, P = .461 and overall survival, P = .983) and the positive survival advantages in nonlepidic predominant tumors (DFS, P = .015 and overall survival, P = .027). CONCLUSION:Adjuvant oral fluoropyrimidines conferred a better survival advantage upon patients with nonlepidic predominant tumors than patients with lepidic predominant tumors. The predominance of a lepidic component could serve as an indicator of adjuvant chemotherapy with oral fluoropyrimidines in stage I lung adenocarcinoma.

journal_name

Clin Lung Cancer

journal_title

Clinical lung cancer

authors

Sasada S,Miyata Y,Mimae T,Tsutani Y,Mimura T,Okada M

doi

10.1016/j.cllc.2015.11.015

subject

Has Abstract

pub_date

2016-09-01 00:00:00

pages

433-440.e1

issue

5

eissn

1525-7304

issn

1938-0690

pii

S1525-7304(15)00279-X

journal_volume

17

pub_type

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