Painful, rapidly growing tumor in the subungual area of the first digit of the right hand.

Tumoración dolorosa de rápido crecimiento en la región subungueal del primer dedo de la mano derecha Medical History A 51-year-old man presented with a very painful, rapidly growing tumor in the subungual area of the first digit of the right hand. The lesion had first appeared a month earlier. The patient had sustained a crush injury to the same digit 20 years earlier. Physical examination revealed a hyperkeratotic tumor with smooth, pink edges in the subungual area of the first digit of the right hand. The tumor was very painful on palpation and was causing the nail plate to separate from the nail bed (Fig. 1). Histopathology Histopathologic examination revealed hyperkeratosis with areas of parakeratosis, epidermal hyperplasia, and a central Figure 1 ଝ Please cite this article as: Perelló-Alzamora MR, et al. Tumoración dolorosa de rápido crecimiento en la región sub-ungueal del primer dedo de la mano derecha. crater containing keratin (Fig. 2). Eosinophilic dyskeratotic cells and lymphoplasmacytic infiltrates were also observed. A plain radiograph revealed a cup-shaped lytic defect in the underlying distal phalanx (Fig. 3). Documento descargado de http://www.actasdermo.org el 09/04/2017. Copia para uso personal, se prohíbe la transmisión de este documento por cualquier medio o formato.