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Chinese Journal of Clinicians(Electronic Edition) ›› 2022, Vol. 16 ›› Issue (10): 975-981. doi: 10.3877/cma.j.issn.1674-0785.2022.10.010

• Clinical Research • Previous Articles     Next Articles

Clinicopathological features and prognostic factors of patients with breast cancer combined with primary lung cancer

Shan Yang1, Wei Gao1, Meng Cheng1, Jiajie Shi1, Cuizhi Geng1, Sainan Li1,()   

  1. 1. Breast Disease Center, the Fourth Hospital of Hebei Medical University, Shijiazhuang 050011, China
  • Received:2022-08-14 Online:2022-10-15 Published:2023-03-18
  • Contact: Sainan Li

Abstract:

Objective

To explore the clinicopathological features and prognosis of breast cancer patients with primary lung cancer, in order to provide help for the diagnosis and differential diagnosis of such patients.

Methods

The clinicopathological data of breast cancer patients with or without primary lung cancer (double primary cancer group and breast cancer group) treated at the Fourth Hospital of Hebei Medical University from September 2009 to January 2021 were retrospectively analyzed, and differences were analyzed. Survival curves were drawn using the Kaplan-Meier method, and single-multivariate logistic regression analysis was used to explore the risk or protective factors for lung cancer in breast cancer patients. Single and multivariate Cox regression analyses were used to explore the risk or protective factors affecting the overall survival of patients.

Results

The two groups of patients were matched using the propensity score matching method, including 40 patients in the double primary cancer group and 100 patients in the breast cancer group. There were significant differences in estrogen receptor (ER) expression, progesterone receptor (PR) expression, human epidermal growth factor receptor 2 (HER2) expression, and Ki67 expression between the two groups (P<0.05). Single multivariate Logistic regression analysis showed that PR negativity, HER2 negativity, and low Ki67 expression were independent risk factors for lung cancer in breast cancer patients (P<0.05). Survival curve analysis demonstrated that the overall survival of patients in the double primary cancer group was shorter than that of the breast cancer group. Multivariate Cox analysis demonstrated that tumor grade was an independent protective factor for the overall survival of patients (P<0.05).

Conclusion

Breast cancer patients with PR-negative, HER2-negative, and low Ki67 expression have a higher probability of developing primary lung cancer. N stage, M stage, tumor stage, tumor grade, and ER negativity are risk factors affecting the overall survival of these patients. The above factors may play an important role in the dual primary breast cancer and lung cancer.

Key words: Breast cancer, Lung cancer, Double primary cancer

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