Prognostic Impact of Node-Spreading Pattern in Surgically Treated Small-Cell Lung Cancer: A Multicentric Analysis
Objective Although surgery in selected small-cell lung cancer (SCLC) patients has been proposed as a part of multimodality therapy, so far, the prognostic impact of node-spreading pattern has not been fully elucidated. To investigate this issue, a retrospective analysis was performed. Methods From 0...
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Published in | Lung Vol. 195; no. 1; pp. 107 - 114 |
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Main Authors | , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
01.02.2017
Springer Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Objective
Although surgery in selected small-cell lung cancer (SCLC) patients has been proposed as a part of multimodality therapy, so far, the prognostic impact of node-spreading pattern has not been fully elucidated. To investigate this issue, a retrospective analysis was performed.
Methods
From 01/1996 to 12/2012, clinico-pathological, surgical, and oncological features were retrospectively reviewed in a multicentric cohort of 154 surgically treated SCLC patients. A multivariate Cox proportional hazard model was developed using stepwise regression, in order to identify independent outcome predictors. Overall (OS), cancer-specific (CSS), and Relapse-free survival (RFS) were calculated by Kaplan-Meier method.
Results
Overall, median OS, CSS, and RFS were 29 (95 % CI 18–39), 48 (95 % CI 19–78), and 22 (95 % CI 17–27) months, respectively. Lymphadenectomy was performed in 140 (90.9 %) patients (median number of harvested nodes: 11.5). Sixty-seven (47.9 %) pN0-cases experienced the best long-term survival (CSS: 71, RFS: 62 months;
p
< 0.0001). Among node-positive patients, no prognostic differences were found between pN1 and pN2 involvement (CSS: 22 vs. 15, and RFS: 14 vs. 10 months, respectively;
p
= 0.99). By splitting node-positive SCLC according to concurrent N1-invasion, N0N2-patients showed a worse CSS compared to those cases with combined N1N2-involvement (N0N2: 8 months vs. N1N2: 22 months;
p
= 0.04). On the other hand, the number of metastatic stations (
p
= 0.80) and the specific node-level (
p
= 0.85) did not affect CSS. At multivariate analysis, pN+ (HR: 3.05, 95 % CI 1.21–7.67,
p
= 0.02) and ratio between metastatic and resected lymph-nodes (RL, HR: 1.02, 95 % CI 1.00–1.04,
p
= 0.03) were independent predictors of CSS. Moreover, node-positive patients (HR: 3.60, 95 % CI 1.95–6.63,
p
< 0.0001) with tumor size ≥5 cm (HR: 1.85, 95 % CI 0.88–3.88,
p
= 0.10) experienced a worse RFS.
Conclusions
In selected surgically treated SCLC, the long-term survival may be stratified according to the node-spreading pattern. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0341-2040 1432-1750 |
DOI: | 10.1007/s00408-016-9954-4 |