No associations were found between DFNA5 CpG4 methylation and ischemia time, pathological tumor-node-metastasis (pTNM) staging, estrogen receptor (ER) status, progesterone receptor (PgR) status, lymphovascular invasion, tumor grade (Nottingham grading system), mitotic activity index (MAI) or maximal tumor diameter (Table 1). Here, PGR is linked to neoplasm.