Local agents
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Anthralin
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Burnt sugar
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Chrysarobin
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Diquat
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Formaldehyde
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Fungal infections
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Glutaraldehyde
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Henna
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Irradiation
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Junctional nevi (punctate, longitudinal bands)
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Nail enamel
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Nicotine, tar
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Paraquat (bands)
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Pecans
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Photographic developer (diffuse)
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Picric acid
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Potassium permanganate
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Resorcinol
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Roasted coffee
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Walnuts
Systemic disorders
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Hyperbilirubinemia (diffuse)
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Malnutrition (diffuse)
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Melanocyte stimulating hormone oversecretion (longitudinal bands)
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-Addison's disease
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- Cushing's disease (postadrenalectomy)
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- Pituitary tumor
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Melanocytic hyperplasia
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Melanoma (longitudinal bands)
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Normal finding (90% of blacks)
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Vitiligo
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