four types of melasma are described on the basis of wood 's light examination : ( 1 ) an epidermal type , ( 2 ) a dermal type , ( 3 ) a mixed type , and ( 4 ) a fourth type , described in patients of dark complexion , in which the lesions , for lack of contrast , are not discernible on wood 's light examination , perhaps due to the increased number of melanosomes in the normal skin of black individuals .
C2698630
dermal type
C0558145
normal skin