Tissue expression of Ki-67 complements prognostic information obtained from classical prognostic features such as tumor size, LN involvement, and pathological grading [28]. Haroon et al. [29] stated that biological features of BC are largely determined by cellular proliferation, and it was concluded that there is a strong correlation between the grade of the tumor and Ki-67 expression, which supports our findings of significant association with a p-value of 0.006 suggesting an association with higher nuclear grade. The gene discussed is MKI67; the disease is neoplasm.