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Onychocytic matricoma.
An Bras Dermatol. 2019 Mar-Apr; 94(2):214-216.AB

Abstract

Onychocytic matricoma is a newly described tumor of the nail matrix. Clinically, it presents with localized thickening of the nail plate and melanonychia. Histologically, it represents a benign acanthoma of onychocytes. There are 8 cases reported in the literature. A 12-year-old girl presented with localized melanonychia and concurrent thickening of the nail plate restricted to the area of pigmentation affecting the right thumb, with no history of trauma or pain. We report a case of this rare tumor occurring in late childhood and provide a comprehensive review of its clinical presentation and differential diagnosis. Both clinicians and dermatopathologists should be aware of the presentation of onychocytic matricoma and include it in their scope of diagnosis of longitudinal nail bands.

Authors+Show Affiliations

Center for Nail Research, Instituto de Dermatologia Professor Rubem David Azulay, Santa Casa da Misericórdia do Rio de Janeiro, Rio de Janeiro (RJ), Brazil.Department of Dermatopathology, Dermatology Service, Hospital Federal de Bonsucesso, Bonsucesso (RJ), Brazil.Center for Nail Research, Instituto de Dermatologia Professor Rubem David Azulay, Santa Casa da Misericórdia do Rio de Janeiro, Rio de Janeiro (RJ), Brazil.Center for Nail Research, Instituto de Dermatologia Professor Rubem David Azulay, Santa Casa da Misericórdia do Rio de Janeiro, Rio de Janeiro (RJ), Brazil.

Pub Type(s)

Case Reports
Journal Article
Review

Language

eng

PubMed ID

31090828

Citation

d'Almeida, Luiza Ferreira Vieira, et al. "Onychocytic Matricoma." Anais Brasileiros De Dermatologia, vol. 94, no. 2, 2019, pp. 214-216.
d'Almeida LFV, Jeunon T, Leverone AP, et al. Onychocytic matricoma. An Bras Dermatol. 2019;94(2):214-216.
d'Almeida, L. F. V., Jeunon, T., Leverone, A. P., & Nakamura, R. (2019). Onychocytic matricoma. Anais Brasileiros De Dermatologia, 94(2), 214-216. https://doi.org/10.1590/abd1806-4841.20197865
d'Almeida LFV, et al. Onychocytic Matricoma. An Bras Dermatol. 2019 Mar-Apr;94(2):214-216. PubMed PMID: 31090828.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Onychocytic matricoma. AU - d'Almeida,Luiza Ferreira Vieira, AU - Jeunon,Thiago, AU - Leverone,Andreia Pizarro, AU - Nakamura,Robertha, Y1 - 2019/05/09/ PY - 2017/11/16/received PY - 2018/03/16/accepted PY - 2019/5/16/entrez PY - 2019/5/16/pubmed PY - 2019/7/5/medline SP - 214 EP - 216 JF - Anais brasileiros de dermatologia JO - An Bras Dermatol VL - 94 IS - 2 N2 - Onychocytic matricoma is a newly described tumor of the nail matrix. Clinically, it presents with localized thickening of the nail plate and melanonychia. Histologically, it represents a benign acanthoma of onychocytes. There are 8 cases reported in the literature. A 12-year-old girl presented with localized melanonychia and concurrent thickening of the nail plate restricted to the area of pigmentation affecting the right thumb, with no history of trauma or pain. We report a case of this rare tumor occurring in late childhood and provide a comprehensive review of its clinical presentation and differential diagnosis. Both clinicians and dermatopathologists should be aware of the presentation of onychocytic matricoma and include it in their scope of diagnosis of longitudinal nail bands. SN - 1806-4841 UR - https://www.unboundmedicine.com/medline/citation/31090828/Onychocytic_matricoma L2 - https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31090828/ DB - PRIME DP - Unbound Medicine ER -