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Potential key roles of tumour budding: a representative malignant pathological feature of non-small cell lung cancer and a sensitive indicator of prognosis

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Objectives To investigate the relationship between tumour budding, clinicopathological characteristics of patients and prognosis in non-small cell lung cancer. Study design A retrospective study was used. Participants We selected 532… Click to show full abstract

Objectives To investigate the relationship between tumour budding, clinicopathological characteristics of patients and prognosis in non-small cell lung cancer. Study design A retrospective study was used. Participants We selected 532 patients with non-small cell lung cancer from China, including 380 patients with adenocarcinoma and 152 with squamous cell carcinoma. Primary and secondary outcome measures Tumour budding was visible using H&E staining as well as pancytokeratin staining. The count data and measurement data were compared using the χ2 test and the t-test, respectively. The overall survival rate was the follow-up result. The survival curves were drawn using the Kaplan-Meier method, and the differences between groups were analysed using the log-rank method. The independent prognostic factor of patients with lung cancer was determined using a multivariate Cox proportional hazard model. Results In patients with lung adenocarcinoma, there was a correlation between tumour budding and spread through air spaces (OR 36.698; 95% CI 13.925 to 96.715; p<0.001), and in patients with squamous cell carcinoma, tumour budding state was closely related to the peritumoural space (OR 11.667; 95% CI 4.041 to 33.683; p<0.001). On Cox regression analysis, multivariate analysis showed that tumour budding, pleural and vascular invasion, spread through air spaces, tumour size, lymph node metastasis, and tumour node metastasis stage were independent risk factors of prognosis for patients with non-small cell lung cancer. Conclusions As an effective and simple pathological diagnostic index, it is necessary to establish an effective grading system in the clinical diagnosis of lung cancer to verify the value of tumour budding as a prognostic indicator. We hope that this analysis of Chinese patients with non-small cell lung cancer can provide useful reference material for the continued study of tumour budding.

Keywords: non small; tumour budding; cell; lung cancer

Journal Title: BMJ Open
Year Published: 2022

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