Seo et al. (2014) reported similar observations in 300 samples of breast carcinomas from women. Likewise, moderate and high expressions of HDAC2 were also more frequently observed in breast carcinomas in women (Muller et al., 2013), as well as HDAC6 in human prostatic carcinomas (Hou et al., 2015). Here, HDAC6 is linked to prostate carcinoma.