According Supardiman (2007), melasma classified based on the clinical picture, the examination with Wood-ray examination and histopatologis.
1. Based on the clinical picture:
a. Form sentrofasial areas include the forehead, nose, the medial cheek, nose and chin down (63%)
b. Continuous forms of covering the nose and cheek lateral (21%)
c. Mandibular form covering mandibular region (16%).
2. Based on the examination with the Wood-ray
a. Epidermal type. On the type of melasma is more clearly visible with the Wood-ray diffraction compared with normal.
b. Dermal type. Type dermal rays Wood with no visible color contrast compared with the normal ray.
c. Type mixture. On the type of mixture, it appears some locations more clearly, while the other is not clear.
d. Type considered difficult because of dark skin color. This type of radiotherapy Wood, lesi become unclear. Differences in types this is the means of therapy. Dermal type more difficult than treated epidermal type.
3. Based on the examination histopatologis
a. Melasma type epidermal. Type of brown epidermal generally. Melanin mainly found in the basalt layer and supra basal. Sometimes there is melanin in the stratum corneum and stratum spinosum.
b. Melasma type dermal. Dermal type blue brown. In the dermal type macrophage melanin found around blood vessel in the dermis and the top down. In addition, at the top of the dermis there is a focus infiltrate.
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