CDKN1B and melanoma: Cytoplasmic p27 has been associated with decreased patient survival, high tumor grade and metastasis in several tumor types including breast carcinomas, acute myeloid leukemia, glioblastoma, melanoma and non-small cell lung carcinomas (Lin et al., 2016; Chu et al., 2008; Liang et al., 2002; Yang et al., 2011; Min et al., 2004; Cheng et al., 2015).