Longitudinal Leukonychia
摘要
Longitudinal leukonychia is defined as a longitudinal white band extending the length of the nail plate. Pathogenesis of longitudinal true leukonychia is a disturbance in the nail matrix, which results in focal parakeratosis and keratin filament disorganization [1]. Pathogenesis of longitudinal apparent leukonychia is vascular bed abnormalities [2].