PSI Texas State Board Nail Tech practice exam

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Which of the following is classified as a skin pigmentation disorder?

Psoriasis
Dermatitis
Lentigo
Acne

The correct answer is: Lentigo

Lentigo is classified as a skin pigmentation disorder due to its involvement in changes to the pigmentation of the skin. Specifically, lentigines are small, brown patches that can appear on the skin, often as a result of sun exposure or aging. This condition arises from an increase in the number of melanocytes, the cells responsible for producing skin pigment (melanin), leading to localized areas of hyperpigmentation. Other conditions mentioned, such as psoriasis, dermatitis, and acne, are primarily inflammatory or related to other skin issues like infection or cell turnover, rather than changes in skin pigmentation specifically. Psoriasis involves rapid skin cell proliferation leading to scaling, dermatitis is characterized by inflammation of the skin, and acne involves clogged pores that can lead to lesions, none of which directly result in altered pigmentation in the same manner as lentigo.