As observed in Table 14, since the accuracy has not increased in all models by adding new features to the set of four features obtained in the previous step, the tests are not continued and it is recognized that in the C5.0 with four properties of {LN involvement rate, Her2 value, Tumor size, free or closed tumor margin} can better help rather than other data mining algorithms to the prediction of breast cancer recurrence on the Ministry of Health and Medical Education and the Iran Cancer Research Center dataset may be made. This evidence concerns the gene ERBB2 and cancer.