Melanonychia
| Melanonychia | |
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| Melanonychia | |
| ICD-9 | 703.8 |
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Overview
Melanonychia is a black or brown pigmentation of the normal nail plate, and may be present as a normal finding on many digits in black patients, as a result of trauma, systemic disease, or medications, or as a post-inflammatory event from such localized events as lichen planus or fixed drug eruption.[1][2]
Classification
There are two types of melanonychia, transverse and longitudinal.
Differentiating melanonychia from other Diseases
Longitudinal melanonychia may be a sign of subungual melanoma (Acral lentiginous melanoma), although there are other diagnosis such as:
- Chronic paronychia
- Onychomycosis
- Subungual hematoma
- Pyogenic granuloma
- Glomus tumor
- Subungual verruca
- Mucous cyst
- Subungual fibroma
- Keratoacanthoma
- Carcinoma of the nail bed
- Subungual exostosis
References
- ↑ Odom, Richard B.; Davidsohn, Israel; James, William D.; Henry, John Bernard; Berger, Timothy G.; Clinical diagnosis by laboratory methods; Dirk M. Elston (2006). Andrews' diseases of the skin: clinical dermatology. Saunders Elsevier. ISBN 0-7216-2921-0.
- ↑ Freedberg, Irwin M.; Fitzpatrick, Thomas B. (2003). Fitzpatrick's dermatology in general medicine. New York: McGraw-Hill, Medical Pub. Division. ISBN 0-07-138076-0.