A 70-year-old man with breast nodules should first determine the benign or malignant nature of the breast nodules. If it is a benign breast nodule such as breast cyst, etc., it can be periodically reviewed or surgically removed, and if it is a malignant breast nodule such as breast cancer, breast sarcoma, etc., it needs to undergo a comprehensive treatment based on surgical treatment. 1. Breast cyst: It is a kind of benign nodule of breast tissue. The main symptoms of this disease are asymptomatic breast nodule and nipple overflow. It can be regularly rechecked or surgically removed as prescribed by the doctor. 2. Breast sarcoma: most patients are over 50 years old, including mesenchymal sarcoma, fibrosarcoma and so on. The main manifestation is breast nodule, which is usually large in size. Extended resection is usually used, and mastectomy can also be considered. 3. Breast cancer: it is one of the common tumors in women in recent years. In the early stage, it is only breast nodule, usually painless, and may be accompanied by axillary lymph node enlargement and so on. The treatment method is surgery, supplemented by chemotherapy and radiotherapy, endocrine therapy, targeted therapy and so on. If a 70-year-old man has breast nodules, he should seek medical treatment in time to find out the cause and receive treatment as prescribed by the doctor.