Article
A New Nail Genodermatosis: Familial Onychocytic Hamartoma Presenting as Polydactylous Longitudinal Leukonychia. Implications in the Early Detection of BAP1 Tumor Predisposition Syndrome.
The American Journal of dermatopathology - 1 Apr 2026
Perrin Christophe, Dadone-Montaudié Bérengère, Petit François
Abstract excerpt
ABSTRACT: Onychocytic matricoma (OCM) is an acquired benign onychogenic tumor producing a localized thickening of the nail plate that usually presents as longitudinal pachymelanonychia. However, longitudinal pachyleukonychia as the presenting sign of OCM is increasingly recognized in clinical practice. To our knowledge, polydactylous OCM has not previously been reported in the literature. This study aims to...
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