<unk>  is recognizable for its horizontal ridges that create a fir-tree shape. Discoloration along the affected area of the nail is also common. The condition is not to be confused with median nail dystrophy, a similar but rarer condition which additionally includes a canal-like vertical ridge. The deformity is most commonly seen on the thumbs, but is also less commonly seen on other nails.
Habit-tic deformity
Planovalgus deformity
Gibbus deformity
Swan neck deformity
Rocker bottom foot
Jammed finger
Ape hand deformity
Carpometacarpal bossing