Postmenopausal breast nodules 4a have a 2% to 10% likelihood of malignancy. Each patient’s condition is different, so you can’t say in absolute terms that it is serious or not serious. Postmenopausal breast nodule 4a suggests that there may be breast cancer lesions, and the probability of malignancy is about 2%~10%. If it is a benign lesion, there are usually no obvious clinical symptoms, and will not cause too much impact on the patient’s health. If it is a malignant lesion, it needs to be actively treated to avoid distant metastasis. Women are advised to go to the breast surgery department of the hospital as soon as possible. Cooperate with the doctor to improve the molybdenum target, chest CT, puncture biopsy and other related examinations to clarify the benign and malignant nature of the nodule. For benign nodules, regular checkups will be sufficient, while surgical removal of the diseased tissue can be considered for malignant nodules.