Intensity of c-kit Group Grade Melasma=20 Vitilgo=20 Control=20   0 N 0 19 0 % 0 95 0 +1 N 0 11 15 % 0 5 75 +2 N 8 0 5 % 80 0 25 +3 N 12 0 0 % 20 0 0 Total N 20 20 20 % 100 100 100 Melasma and control X2 4.336 p 0.006* Vitiligo and control X2 6.247 p 0.004* P value ≤ 0.05 (significant difference)

Table 3: Intensity of c-kit expression in the studied groups.