KRT15 and basal cell carcinoma: CK [17, 18], CK5/6 [19], CK7 [18, 20], CK15 [21], CK19 [14], EMA [18, 22], ɑ-SMA [20], and Ln-ɤ 2 [23] were diffusely positive in most of the tumor cells; Bcl-2 [20] was focally positive; CK20 [20], c-erbB-2 [20], Ber-EP4 [14, 24], and CD34 [20] were negative, while CK20 and Ber-EP4 were positive in desmoplastic trichoepithelioma and desmoplastic basal cell carcinoma, respectively.