Synonyms: Acanthoma of the nail matrix
Onychocytic matricoma is a rare benign nail tumor originating in the nail matrix characterized by localized pachyonychia and variable degrees of pigmentation: pigmented melanocytic (common longitudinal melanonychia that may simulate a foreign body) or hypopigmented. Histopathology demonstrates a purely epithelial tumor with endokeratinization in the deep portion and concentrically arranged nests of prekeratogenous and keratogenous cells.
Data from Orphanet are used to provide information on a disease's name, synonym(s), and overview.
Orphadata: Free access data from Orphanet. © INSERM 1999. Available on http://www.orphadata.org. Data version December 2023
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