Cyclin D3 expression displayed no correlationship with breast cancer patients’ age, menopausal status, tumor size, Ki67, vascular thrombosis, tumor size, node status or TNM status, while Cyclin D3 was positively correlated with ER, PR and negatively correlated with HER2 and tumor differention status (p < 0.05) (Additional file 1: Table S1). The gene discussed is MKI67; the disease is neoplasm.