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 matter	external therapeutics
	Cosmetics
	Working materials

Microorganisms	Bacteria
	Dermatophytes
	Yeasts
	Moulds
	Drugs

Melanocytic pigmentation	Lentigo
	melanocytic nevus
	malignant melanoma

Tumours of the nail matrix	Basalioma
	M. Bowen
	Squamous cell carcinoma

Subungual tumors	verruca vulgaris
	Ganglion
	Glomus tumor

Haemoglobinogenic pigment	Bleeding

Pigmentation in dermatological diseases	lichen planus
	X-ray irradiation
	Peutz-Jeghers Syndrome

Pigmentation for internal diseases	pernicious anemia
	M. Wilson
	M. Addison
	Porphyria cutanea tarda

Pigmentation through systemically applied drugs	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