Onychopapilloma
From dermoscopedia
Onychopapilloma is a benign neoplasm of the nail bed and the distal matrix first described by Baran and Perrin1 in 1995[1].
It usually presents itself clinically and dermoscopically as a localized longitudinal band that can have different colors (longitudinal erythronychia[2], longitudinal leukonychia[3], or melanonychia[4]) associated with splinter hemorrhages and a localized distal subungual keratosis[5].
Histological examination of an onychopapilloma shows apapillomatous nail bed and distal matrix, associated to layers of hyperkeratosis and matrix metaplasia, and no granular layer[6]
References
- ↑ R. Baran, C. Perrin Localized multinucleate distal subungual keratosis Br J Dermatol, 133 (1) (1995), pp. 77-82
- ↑ R. Baran, R. Perrin Longitudinal erythronychia with distal subungual keratosis: onychopapilloma of the nail bed and Bowen's disease Br J Dermatol, 143 (1) (2000), pp. 132-135
- ↑ V. Criscione, G. Telang, N.J. Jellinek Onychopapilloma presenting as longitudinal leukonychia J Am Acad Dermatol, 63 (3) (2010), pp. 541-542
- ↑ M. Miteva, P.A. Fanti, P. Romanelli, M. Zaiac, A. Tosti Onychopapilloma presenting as longitudinal melanonychia J Am Acad Dermatol, 66 (6) (2012), pp. e242-e243
- ↑ J Am Acad Dermatol. 2016 Mar;74(3):521-6. doi: 10.1016/j.jaad.2015.08.053. Epub 2015 Oct 27. Clinical, dermoscopic, and pathologic features of onychopapilloma: A review of 47 cases. Tosti A1, Schneider SL2, Ramirez-Quizon MN3, Zaiac M4, Miteva M5.
- ↑ R. Baran, R. Perrin Longitudinal erythronychia with distal subungual keratosis: onychopapilloma of the nail bed and Bowen's disease Br J Dermatol, 143 (1) (2000), pp. 132-135
