Key clinical point: Women with breast cancer (BC), especially those with low-grade malignancy, had a greater risk of developing a second primary lung cancer.
Major finding: The risk for second primary lung cancer was 1.4 (95% CI 1.25-1.55) times higher in patients with BC compared with the general population, with estrogen receptor-negative BC, low Ki67 levels, and no lymph node metastasis (all P = .01) being significant risk factors. Among patients who developed lung cancer, the rate of epidermal growth factor receptor mutation was high (78.5%).
Study details : This study analyzed the data of 9179 patients with BC, of which 6512 patients had undergone diagnostic chest computed tomography and 55 patients were diagnosed with a second primary lung cancer.
Disclosures: This study was supported by the National Key Research and Development Program of China and other sources. The authors declared no conflicts of interest.
Source: Zeng T et al. High rate of epidermal growth factor receptor-mutated primary lung cancer in patients with primary breast cancer. Front Oncol. 2022;12:985734 (Oct 13). Doi: 10.3389/fonc.2022.985734