“…Cells are frequently negative for basal/myoepithelial markers, with variable expression of calponin and p63 [ 176 ]. Positive staining with EGFR, EMA, MUC1 (mucin 1), MUC4 (mucin 4), SOX10 (SRY-Box Transcription Factor 10), and GCDFP-15, among others, have also been reported, although their expression is variable and non-specific [ 175 , 183 ].…”