Onychomatricoma (OM) is a rare benign tumor of the nail matrix clinically characterized by longitudinal bands of yellow thickening of the nail plate with transverse overcurvature and splinter hemorrhages.1-4 The diagnosis is often difficult, and many cases are misdiagnosed and erroneously treated.
Soto R, Wortsman X, Corredoira Y. Onychomatricoma: Clinical and Sonographic Findings. Arch Dermatol. 2009;145(12):1461–1462. doi:10.1001/archdermatol.2009.312
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