<unk>  is a condition of the nail caused by external trauma to the nail matrix. The condition is characterized by ridges which run horizontally across the entire nail, most often occurring on the thumbs, as well as marked damage to or absence of cuticles.
Habit-tic deformity
Planovalgus deformity
Gibbus deformity
Swan neck deformity
Rocker bottom foot
Jammed finger
Ape hand deformity
Carpometacarpal bossing