Whether or not to remove the entire breast for a grade 4 breast nodule depends on whether or not the breast nodule is malignant and the size and location of the tumor. When symptoms of a breast nodule are present, a biopsy or surgical biopsy is required to diagnose whether the tumor is benign or malignant. If a grade 4 breast nodule is diagnosed as benign, the entire breast does not need to be removed and the nodule can be removed. However, if the diagnosis of grade 4 breast nodule is malignant tumor after examination, according to the degree of malignant tumor as well as the size and location of the nodule, whether it is possible to conserve the breast or not under the assessment of professional doctors, if not, the whole breast needs to be cut off. Therefore, patients with grade 4 breast nodules should receive timely treatment in regular hospitals to avoid aggravation of their condition and impact on their health.