PMC5871393_01
Clinical examination. Third toe with important onychodystrophy and an
erythematous nodule on the proximal nail border
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On clinical examination we observed periungual erythema and a palpable hardened nodule on the proximal nail border, as well as xanthonychia and important onychodystrophy extending vertically from the nail bed in a filiform pattern (Figure 1).
Dermoscopy. Splinter hemorrhages, xanthonychia, and white transverse
lines
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Onychoscopy of the nail plate revealed proximal splinter hemorrhages, white transverse lines, and yellowish areas (Figure 2).
Histopathological examination. Papillomatous projections inserted into
the nail plate (Hematoxylin & eosin, X40)
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After avulsion of the matrix and excision of the tumor, histopathological examination revealed epithelial proliferation in the nail matrix, sometimes papillomatous, and fibrous stroma, confirming the diagnosis of onychomatricoma (Figure 3).
PMC5871393_02