Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Case Reports
. 2015 Mar-Apr;90(2):265-7.
doi: 10.1590/abd1806-4841.20153650.

Onychomatricoma: a tumor unknown to dermatologists

Glaysson Tassara Tavares  1 , Nilton Gioia Di Chiacchio  2 , Nilton Di Chiacchio  2 , Marcos Vilela de Souza  1
Affiliations
Case Reports

Onychomatricoma: a tumor unknown to dermatologists

Glaysson Tassara Tavares et al. An Bras Dermatol. 2015 Mar-Apr.

Abstract

A sixty-one year old white female was referred to the Dermatology Department to treat an ingrown nail in the inner corner of the left hallux. Examination of the entire nail unit showed the presence of xanthonychia in the outer corner besides thickening and increase in the transverse curvature of the nail plate. Dermoscopy and nuclear magnetic resonance of the free edge of the nail plate detected characteristic signs of onychomatricoma, a diagnosis that was later confirmed by anatomopathological exam.

PubMed Disclaimer

Conflict of interest statement

Conflict of interest: None

Figures

FIGURE 1
FIGURE 1
Ingrowth at the inner corner, presence of transverse over-curvature, ungual hyperkeratosis and xanthonychia
FIGURE 2
FIGURE 2
Xanthonychi a (longitudinal yellowish stripe), inner corner ingrowth, and transverse over-curvature
FIGURE 3
FIGURE 3
Dermoscopy the free ungual edge showing perforations on the distalportion of thenail plate( DermLite DL3 U.S.A.)
FIGURE 4
FIGURE 4
MRI (T2) showing fingerlike projections located on the lateral portion of the nail matrix
FIGURE 5
FIGURE 5
Histologic exam showing proliferation of the epidermis at the proximal fold/matrix, often coating papilliferous / digitiform structures, with a fibrous axis projecting on the nail plate (HE – 40x)
FIGURE 6
FIGURE 6
Intra-operatory . Onychomatri coma with tumoral projections seen after the avulsion of the nail plate (illustrative image of another clinical case)
See this image and copyright information in PMC

References

    1. Baran R, Klint A. Onychomatrixoma. Filamentous tufted tumor in the matrix of a funnel-shaped entity (report of three cases) Br J Dermatol. 1992;126:510–515. - PubMed
    1. Di Chiacchio N, Tavares GT, Padoveze EH, Bet DL, Di Chiacchio NG. Onicomatricoma. Surg Cosmet Dermatol. 2013;5:10–14.
    1. Perrin CH, Goettmann S, Baran R. Onychomatricoma: clinical and histopathologic findings in 12 cases. J Am Acad Dermatol. 1998;39:560–564. - PubMed
    1. Di Chiacchio ND, Farias DC, Piraccini BM, Hirata SH, Richert B, Zaiac M, et al. Consensus on melanonychia nail plate dermoscopy. An Bras Dermatol. 2013;88:309–313. - PMC - PubMed
    1. Soto R, Wortsman X, Corredoira Y. Onychomatricoma: clinical and sonographic findings. Arch Dermatol. 2009;145:1461–1462. - PubMed

Publication types

LinkOut - more resources