Your patient complains of a progressive loss of pigment in various patches on the body.Affected skin surfaces are otherwise normal (e.g.no scaling,vesicles,elevation,or other changes).The most likely cause is:

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Vitiligo is a condition where there is a loss of pigment in various patches on the body. The affected skin surfaces are otherwise normal, and there are no other changes such as scaling, vesicles, elevation, or other changes. Acanthosis nigricans is characterized by thickened, velvety, dark patches of skin with a rough texture. Psoriasis is characterized by raised, red, scaly patches of skin. Pityriasis alba is characterized by round, pale patches of skin that may be scaly.

Your Patient Complains of a Progressive Loss of Pigment in Various