p16 Expression Is Lost in Severely Atypical Cellular Blue Nevi and Melanoma Compared to Conventional, Mildly, and Moderately Atypical Cellular Blue Nevi

Figure 2

H and E and p16 staining of representative conventional CBN, mildly atypical CBN, severely atypical CBN, and a melanoma (metastatic) mimicking CBN. p16 staining intensity: benign CBN=3, mildly atypical CBN=3, severely atypical CBN=1, and melanoma =0.