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A Tumor Hidden Beneath the Nail Plate: Report of A Rare Case of Onychomatricoma with Three-Dimensional Histopathological Analysis and Immunohistochemical Study

Onychomatricoma is a tumor of the nail matrix which often presents with alterations in the nail plate while the tumor itself is concealed beneath the nail plate. It is a benign, biphasic fibroepithelial tumor which has to be differentiated from other subungual and periungual tumors. We report a rare case of onychomatricoma and describe a three-dimensional histopathological analysis and immunohistochemical patterns of onychomatricoma.