Patient: In March 2001, I had a radical right mastectomy, and after radiotherapy, in March 2008, I found a 1.3*1.2 lump in my left breast, and now I am not sure if it is cancerous through ultrasound. Zhang Lianbin, Department of Thoracic Surgery, Beijing 301 Hospital: You can arrange for the patient to go to the hospital for examination. You can perform a puncture biopsy of the left breast mass under ultrasound guidance or pathological examination after excision under local anesthesia. If it is malignant then radical surgery or breast-conserving surgery is required.