Dermoscopic examination of the nail bed and matrix

Abstract

Background: Dermoscopy has furthered advances in the differential diagnosis of longitudinal melanonychia; however, fewer details observed in the nail, as compared to skin lesions, make interpretation difficult. Methods: Ten cases of longitudinal melancholia, from several etiologies, were submitted to direct dermoscopic examination of the nail bed and matrix. Results: We observed the presence of globules, streaks, and pigment network in the nail bed and matrix, which are dermoscopic features not seen in the nail plate. Conclusions: This procedure enables visualization of dermascopic features not seen in the nail plate, making the diagnosis of melanocytic lesions easier. © 2004 The International Society of Dermatology.