MKI67 and metastatic malignant neoplasm in the lymph nodes: Our meta-analysis showed that overexpression of MYC significantly correlated to large tumor size, OR=1.269 (1.030-1.563); high histologic grade, OR= 2.151 (1.623-2.851); lymph node metastasis, OR=1.466 (1.115-1.928); negative ER status, OR=1.810 (1.285-2.551); negative PR status, OR=1.545 (1.099-2.173); positive Ki67 expression, OR=2.212 (1.526-3.206).