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. Longitudinal melanonychia may be a sign of subungual melanoma (Acral lentiginous melanoma),[3] 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, and 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.