Nail Dystrophies

Three common nail dystrophies are; Beau's lines. The identifying features of this are transverse ridges are usually transient. Most commonly caused from, trauma or infection.
Koilonychia. The identifying features of this include nails that appear thin and concaved. The main cause of this is trauma, but can also be contributed to an iron deficiency.
Nail-patella syndrome; this is a congenital nail disorder. The identifying features are absent or rudimentary nails and