Among the 961 clinical instances, there are a number of instances with missing attribute values, including 2 BIRADSs, 5 ages, 31 shapes, 48 margins, and 76 densities. This results in a total of 131 clinical instances missing either one or two of the five attributes. For consistent analysis in our research, the 131 clinical instances with missing attributes were removed from this dataset, resulting in a dataset of 830 clinical instances. Among the 830 clinical instances, 427 (51.45%) instances are benign disease cases and 403 (48.55%) instances are malignant breast cancer cases.