KRT14 and skin basal cell carcinoma: When oncogenic marker expression is normalized to levels of keratin 14, a pan-epithelial marker, the expression profile of P6's nevus was non-neoplastic resembling normal skin, whereas the nevi from P4 and P5 exhibited a BCC-like profile, and the lesion from P1 was enriched for melanoma tumor markers (Fig. 4B).