All the patients had multidisciplinary team consultations, after which 20 patients were recommended to have preoperative treatment for breast cancer, including six triple‐negative breast cancer patients who received chemotherapy followed by surgery, four patients with Her‐2 overexpression who received preoperative chemotherapy + targeted therapy followed by surgery, 10 patients with luminal A/B breast cancer who received endocrine therapy during the treatment for lung cancer. The gene discussed is ERBB2; the disease is lung carcinoma.