KRT17 and psoriasis: There was a significant inverse correlation between normal epidermal keratins K14 and K10 and PASI score (r = − 0.998; r = − 0.996; P < 0.001), respectively, in mild psoriasis, whereas the abnormal hyperproliferative keratins K16 and K17 showed a positive correlation with PASI score (r = 0.999; r = 0.997; P < 0.001) in mild psoriasis.