LAUSR

From Yo Fund Conf Corre G Yo TORY HIS A 57-year-old woman presented with a progressively enlarging irregular black patch of 1-year duration on the left fourth toenail (Fig 1). The patient denied new medications, history of trauma, or previous nail dyspigmentation. Proximal and lateral nail folds were not involved and pigmentation of the hyponychium was not evident. The patch could not be removed with scratching of the nail plate. Dermoscopy revealed nonlongitudinal, black to brown, reticular pigmentation with overlying white scale and distal onycholysis (Fig 2).