1. The Battle for Accuracy: Identifying the Most Effective Grading System for Lung Invasive Mucinous Adenocarcinoma.
- Author
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Jia J, Zhang G, Wei L, Qi L, Wang X, Li L, Zeng H, Wang J, Xue Q, Ying J, and Xue L
- Subjects
- Humans, Male, Female, Retrospective Studies, Survival Rate, Middle Aged, Aged, Prognosis, Follow-Up Studies, Neoplasm Invasiveness, Aged, 80 and over, Adult, Adenocarcinoma, Mucinous pathology, Adenocarcinoma, Mucinous classification, Lung Neoplasms pathology, Lung Neoplasms classification, Neoplasm Grading
- Abstract
Background: The prognostic analysis of lung invasive mucinous adenocarcinoma (IMA) is deficient due to the lack of a universally recommended histological grading system, leading to unregulated treatment approaches., Objective: We aimed to examine the clinical trajectory of IMA and assess the viability of utilizing the existing grading system for lung invasive non-mucinous adenocarcinoma in the context of IMA., Methods: We retrospectively collected clinicopathological data from 265 IMA patients. Each case re-evaluated the tumor grade using the following three classification systems: the 4th Edition of the World Health Organization classification system, the International Association for the Study of Lung Cancer (IASLC) grading system, and a two-tier grading system. We performed a comparative analysis of these grading systems and identified the most effective grading system for IMA., Results: The study comprised a total of 214 patients with pure IMA and 51 patients with mixed IMA. The 5-year overall survival (OS) rates for pure IMA and mixed IMA were 86.7% and 57.8%, respectively. All three grading systems proved to be effective prognostic classifiers for IMA. The value of area under the curve at 1-, 3-, and 5-year OS was highest for the IASLC grading system compared with the other grade systems and the clinical stage. The IASLC classification system was an independent prognostic predictor (p = 0.009, hazard ratio 2.243, 95% confidence interval 1.219-4.127)., Conclusion: Mixed IMA is more aggressive than pure IMA, with an OS rate on par with that of high-grade pure IMA. The IASLC grading system can better indicate prognosis and is recommended for lung IMA., (© 2024. Society of Surgical Oncology.)
- Published
- 2024
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