4c refers to the value assigned to a patient’s breast during a mammogram. 4c indicates the possibility of malignancy of the nodule. The Birads of breast are divided into six categories, the higher the value, the higher the risk of breast cancer. 4 categories are more suspicious, among which 4 categories are divided into three types of ABC, 4a is less suspicious of cancer, 4b is medium suspicious, 4c is relatively high suspicious, the possibility of malignant change is between 3% and 10%, you need to go to the hospital for tissue biopsy. If the result is benign, it needs to be followed up and observed for half a year, otherwise it needs to be treated in time or observed and re-examined at any time. Breast nodule category 4C belongs to a certain risk, patients need to go to the hospital in time to improve the relevant examination, according to the results of the examination for the appropriate treatment.