What Is the accuracy of clinical staging for stage III-single-station N2 NSCLC? A multi-centre UK study
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Author
Craig, ChristopherJohnston, Janet
Goodley, Patrick
Bishop, Paul
Al-Najjar, Haider
Brown, Louise
Gallagher, Joanna
Sundar, Ramachandran
Upperton, Sara
Callister, Matthew
Meek, David
Succony, Laura
Parvez, Wadood
Tufail, Muhammad
Jayasekera, Geeshath
Maclay, John
Livesey, Alana
Woolhouse, Ian
Smith, Natalie
Bibby, Anna
Evison, Matthew
Publication date
2024-05-30
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Introduction: Single-station N2 (ssN2) versus multi-station N2 has been used as a selection criterion for treatment recommendations between surgical versus non-surgical multimodality treatment in stage III-N2 NSCLC. We hypothesized that clinical staging would be susceptible to upstaging on pathologic staging and, therefore, challenge this practice. Methods: A retrospective study of prospectively collected routine clinical data for patients with stage III-N2 NSCLC that had completed computed tomography (CT), positron emission tomography (PET), and staging endobronchial ultrasound (EBUS) and had been confirmed clinical stage III-ssN2 at multidisciplinary team discussion and went on to complete surgical resection as the first treatment to provide pathologic staging. The study was completed in two cohorts (A) across a single cancer alliance in England (Greater Manchester) January 1, 2015 to December 31, 2018 and (B) across five United Kingdom centers to validate the findings in part A January 1, 2016 to December 31, 2020. Results: A total of 115 patients met the inclusion criteria across cohort A (56 patients) and cohort B (59 patients) across 15 United Kingdom hospitals. The proportion of cases in which clinical stage III-ssN2 was upstaged to pathologic stage III-multi-station N2 was 34% (19 of 56) in cohort A, 32% in cohort B (19 of 59), and 33% across the combined study cohort (38 of 115). Most patients had a single radiologically abnormal lymph node on CT and PET (88%, 105 of 115). In the majority, the reasons for missed N2 disease on staging EBUS were due to inaccessible (stations 5, 6, 8, 9) N2 nodes at EBUS (34%, 13 of 38) and accessible lymph nodes not sampled during staging EBUS as not meeting sampling threshold (40%, 15 of 38) rather than false-negative sampling during EBUS (26%, 10 of 38). Conclusions: During multidisciplinary team discussions, clinicians must be aware that one-third of patients with stage III-ssN2 on the basis of CT, PET, and staging EBUS do not truly have ssN2 and this questions the use of this criterion to define treatment recommendations.Citation
Craig C, Johnston J, Goodley P, Bishop P, Al-Najjar H, Brown L, Gallagher J, Sundar R, Upperton S, Callister M, Meek D, Succony L, Parvez W, Tufail M, Jayasekera G, Maclay J, Livesey A, Woolhouse I, Smith N, Bibby A, Evison M. What Is the Accuracy of Clinical Staging for Stage III-Single-station N2 NSCLC? A Multi-Centre UK Study. JTO Clin Res Rep. 2024 May 30;5(8):100694. doi: 10.1016/j.jtocrr.2024.100694.Type
ArticlePMID
39161961Publisher
Elsevierae974a485f413a2113503eed53cd6c53
10.1016/j.jtocrr.2024.100694