An egg-sized lump in the breast requires surgery. Benign lumps can be removed alone, while malignant lumps are operated on in different ways depending on the circumstances. Breast lumps are categorized as benign and malignant, and need to be diagnosed as benign or malignant based on pathology. If the lump is benign, removal of the lump can be curative. If the lump is malignant, the egg-sized lump can be treated with neoadjuvant therapy, and surgery will be performed after the lump shrinks, and endocrine therapy, targeted therapy, radiotherapy, etc. will be performed according to the patient’s condition and medical advice. Breast egg-sized lumps for medical treatment, under the guidance of the doctor to choose the appropriate treatment, if the malignant tumor is not timely medical treatment, it is likely to lead to metastasis of the tumor makes it more difficult to treat.