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Dyschromia
Specialty	Dermatology

Dyschromia refers to an alteration of the color of the skin or nails.^[1]

"Hyperchromia" can refer to hyperpigmentation,^[2] and "hypochromia" can refer to hypopigmentation.^[3]

"Dyschromatoses" involve both hyperpigmented and hypopigmented macules.^[4]

References

Vitiligo	Quadrichrome vitiligo Vitiligo ponctué
Syndromic	Alezzandrini syndrome Vogt–Koyanagi–Harada syndrome
Melanocyte development	Piebaldism Waardenburg syndrome Tietz syndrome

Albinism	Oculocutaneous albinism Ocular albinism in humans
Melanosome transfer	Hermansky–Pudlak syndrome Chédiak–Higashi syndrome Griscelli syndrome Elejalde syndrome Griscelli syndrome type 2 Griscelli syndrome type 3
Other	Cross syndrome ABCD syndrome Albinism–deafness syndrome Idiopathic guttate hypomelanosis Phylloid hypomelanosis Progressive macular hypomelanosis

Leukoderma w/o
hypomelanosis

Ungrouped

Reticulated	Dermatopathia pigmentosa reticularis Pigmentatio reticularis faciei et colli Reticulate acropigmentation of Kitamura Reticular pigmented anomaly of the flexures Naegeli–Franceschetti–Jadassohn syndrome Dyskeratosis congenita X-linked reticulate pigmentary disorder Galli–Galli disease Revesz syndrome
Diffuse/ circumscribed	Lentigo/Lentiginosis: Lentigo simplex Liver spot Centrofacial lentiginosis Generalized lentiginosis Inherited patterned lentiginosis in black persons Ink spot lentigo Lentigo maligna Mucosal lentigines Partial unilateral lentiginosis PUVA lentigines Melasma Erythema dyschromicum perstans Lichen planus pigmentosus Café au lait spot Poikiloderma (Poikiloderma of Civatte Poikiloderma vasculare atrophicans) Riehl melanosis
Linear	Incontinentia pigmenti Scratch dermatitis Shiitake mushroom dermatitis
Other/ ungrouped	Acanthosis nigricans Freckle Familial progressive hyperpigmentation Pallister–Killian syndrome Periorbital hyperpigmentation Photoleukomelanodermatitis of Kobori Postinflammatory hyperpigmentation Transient neonatal pustular melanosis

Other
pigments

Iron	Hemochromatosis Iron metallic discoloration Pigmented purpuric dermatosis Schamberg disease Majocchi's disease Gougerot–Blum syndrome Doucas and Kapetanakis pigmented purpura/Eczematid-like purpura of Doucas and Kapetanakis Lichen aureus Angioma serpiginosum Hemosiderin hyperpigmentation
Other metals	Argyria Chrysiasis Arsenic poisoning Lead poisoning Titanium metallic discoloration
Other	Carotenosis Tar melanosis