Pigmented onychomatricoma may originate from a childhood trauma: A case report.

Hand Surg Rehabil

Department of plastic & reconstructive surgery, hand & microsurgery, American University of Beirut Medical Center, Cairo street, Beirut, Lebanon.

Published: December 2019

Pigmented onychomatricoma (OM) is a very rare benign fibroepithelial tumor of the nail matrix. We report the case of a 23-year-old Lebanese man with 15-year history of nail plate dystrophy with longitudinal ridging, yellowish discoloration, excessive transverse curvature and late-onset melanonychia along the medial third of the right thumb nail. Excisional biopsy was performed and confirmed OM. We outline the clinical history, radiological and histopathological findings as well as the surgical and reconstructive technique of this unusual case of OM. The age group, history of crush injury, and pigmentation of the nail plate make of this rare form of ungual tumor an interesting case report.

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http://dx.doi.org/10.1016/j.hansur.2019.09.002DOI Listing

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Article Synopsis
  • Onychomatricoma is a type of tumor that grows in the area where nails are made and can look different in some people; a rare version can cause dark streaks and thickening of the nail.
  • A 41-year-old woman had a problem with her left middle fingernail for 10 years, where it became black and thick, and doctors found specific patterns and changes in the nail when they looked closely.
  • Doctors figured out that this condition can look similar to other nail problems, but using special tests and imaging can help tell them apart; still, cutting out a piece of the nail is the best way to be sure.
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Introduction: Onychomatricoma is a rare subungual tumor composed of stroma and nail matrix-like epithelium. Only seven cases of the pigmented variant have been reported in the literature.

Case Report: We present a 62-year-old male patient with a 2-years history of a single fingernail thickening, deformation, and hyperpigmentation.

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