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Dermatopathology • An. Bras. Dermatol. 95 (2) • May-Jun 2020 • https://doi.org/10.1016/j.abd.2019.03.009   copy

Melanonychia associated with subungual follicular inclusions: report of three cases☆ ☆ How to cite this article: Câmara de Oliveira M, Barcaui CB, Barcaui EO, Piñeiro-Maceira J. Melanonychia associated with subungual follicular inclusions: report of three cases. An Bras Dermatol. 2020;95:217-20. , ☆☆ ☆☆ Study conducted at the Dermatology Service, Hospital Universitário Pedro Ernesto, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.

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Abstract

Melanonychia is the change in the coloration of the nail plate resulting from the deposition of melanin. Among its causes are melanocytic hyperplasia, melanocytic activation and nail melanoma. Subungual follicular inclusions are histological findings of unknown etiology, possibly related to trauma. We present three cases of melanonychia of different etiologies with subungual follicular inclusions, an association that has not been well described and with an indefinite pathogenesis.

KEYWORDS
Dermoscopy; Histology; Nails; Ultrasonography

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