Furthermore, six studies reported data on tumor size [10], [20], [22], [24], [35], [47], sixteen studies reported data on T category [8]–[10], [14]–[15], [17]–[18], [20]–[22], [24]–[25], [31], [34]–[35], [47], fourteen studies reported data on N category [9]–[10], [14]–[15], [20]–[25], [31], [34]–[35], [47], nine studies reported data on distant metastasis [14], [20], [22]–[25], [31], [34], [47], eighteen studies reported data on histology and their relationship with cyclin D1 expression [8]–[10], [13]–[15], [17]–[18], [20]–[24], [31]–[32], [34]–[35], [47]. Here, CCND1 is linked to neoplasm.