KIT and freckles: However, the dermal c-kit expression in the lesional skin of Riehl’s melanosis (H score, mean ± SD = 16.14 ± 1.49) was increased compared to perilesional skin (H score, mean ± SD = 8.80 ± 2.41; p = 0.002) and healthy controls (H score, mean ± SD = 5.25 ± 1.92; p = 0.001; Figure 5).