Nail pigmentation - Altmeyers Encyclopedia

Definition
This section has been translated automatically.

Nail discoloration due to various causes (see table 1). S.a.u. Melanonychia striata longitudinalis.

Etiology	Examples
foreign body	external therapeutics
	cosmetics
	working substances

microorganisms	bacteria
	dermatophytes
	yeasts
	Molds
	Medicinal products

Melanocytic pigmentation	lentigo
	melanocytic nevus
	malignant melanoma

Tumors of the nail matrix	basal cell carcinoma
	M. Bowen
	Squamous cell carcinoma

Subungual tumors	Verruca vulgaris
	ganglion
	Glomus tumor

Hemoglobinogenic pigment	Hemorrhages

Pigmentation in dermatological diseases	Lichen planus
	X-ray irradiation
	Peutz-Jeghers syndrome Laugier-Hunziker syndrome

Pigmentation in internal diseases	pernicious anemia
	M. Wilson's disease
	M. Addison's disease
	Porphyria cutanea tarda

Pigmentation due to systemically applied medication	Tetracyclines
	Cytostatics

Kreusch J et al (1992) Reflected light microscopic evaluation of pigmented nail changes. Dt Dermatol 7: 1006-1015
Robinson JK et al (2004) Digital epiluminescence microscopy monitoring of high-risk patients. Arch Dermatol 140: 49-56