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Impact of High-Grade Patterns in Early-Stage Lung Adenocarcinoma: A Multicentric Analysis

Autores: Bertoglio, P.; Aprile, V. (Autor de correspondencia); Ventura, L.; Cattoni, M.; Nachira, D.; Lococo, F.; Rodríguez Pérez, María; Guerrera, F.; Minervini, F.; Querzoli, G.; Bocchialini, G.; Bacchin, D.; Franzi, F.; Rindi, G.; Bellafiore, S.; Femia, F.; Bogina, G. S.; Solli, P.; Kestenholz, P.; Ruffini, E.; Paci, M.; Margaritora, S.; Imperatori, A. S.; Lucchi, M.; Gnetti, L.; Terzi, A. C.
Título de la revista: LUNG
ISSN: 0341-2040
Volumen: 200
Número: 5
Páginas: 649 - 660
Fecha de publicación: 2022
Objective The presence of micropapillary and solid adenocarcinoma patterns leads to a worse survival and a significantly higher tendency to recur. This study aims to assess the impact of pT descriptor combined with the presence of high-grade components on long-term outcomes in early-stage lung adenocarcinomas. Methods We retrospectively collected data of consecutive resected pT1-T3N0 lung adenocarcinoma from nine European Thoracic Centers. All patients who underwent a radical resection with lymph-node dissection between 2014 and 2017 were included. Differences in Overall Survival (OS) and Disease-Free Survival (DFS) and possible prognostic factors associated with outcomes were evaluated also after performing a propensity score matching to compare tumors containing non-high-grade and high-grade patterns. Results Among 607 patients, the majority were male and received a lobectomy. At least one high-grade histological pattern was seen in 230 cases (37.9%), of which 169 solid and 75 micropapillary. T1a-b-c without high-grade pattern had a significant better prognosis compared to T1a-b-c with high-grade pattern (p = 0.020), but the latter had similar OS compared to T2a (p = 0.277). Concurrently, T1a-b-c without micropapillary or solid patterns had a significantly better DFS compared to those with high-grade patterns (p = 0.034), and it was similar to T2a (p = 0.839). Multivariable analysis confirms the role of T descriptor according to high-grade pattern both for OS (p = 0.024; HR 1.285 95% CI 1.033-1.599) and DFS (p = 0.003; HR 1.196, 95% CI 1.054-1.344, respectively). These results were confirmed after the propensity score matching analysis. Conclusions pT1 lung adenocarcinomas with a high-grade component have similar prognosis of pT2a tumors.