Onychopapilloma

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 Editor: Luc Thomas

 Author(s): Amélie Boespflug, Luc Thomas
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Description This chapter describes dermoscopy of onychopapilloma
Author(s) Luc Thomas · Amélie Boespflug
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Status update June 25, 2018
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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].


1993c.JPG.jpg Nail plate free edge -Onychopapilloma

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

  1. R. Baran, C. Perrin Localized multinucleate distal subungual keratosis Br J Dermatol, 133 (1) (1995), pp. 77-82
  2. 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
  3. V. Criscione, G. Telang, N.J. Jellinek Onychopapilloma presenting as longitudinal leukonychia J Am Acad Dermatol, 63 (3) (2010), pp. 541-542
  4. 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
  5. 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.
  6. 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