瑞尔黑变病是一种发生在面颈部的色素沉着性皮肤病，严重影响患者容貌。
Riehl's melanosis is a pigmented dermatitis that develops over the face and neck, which affects the appearance of patients.
瑞尔黑变病是一种发生在面颈部的色素沉着性皮肤病，严重影响患者容貌。
Riehl's melanosis is a pigmented dermatitis that develops over the face and neck, which affects the appearance of patients.
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