What is trachyonychia?

• Nail LP-induced TND is typically seen inchildhood • It has also been described in adults inassociation with gold allergy • It is characterized by brittle, thin nails, withexcessive longitudinal ridging, pitting, and onychoschizia • It can be of two types, namely severe, opaquetype trachyonychia, seen as diffusely ridged,thickened nails with lack of luster and asandpaper-like surface, or a milder, shiny typewith numerous, small superficial pitsimparting a shiny nail plate surface