Template:Fingertip anatomy

Hand and finger diagnoses

A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. hyponychium; H. free margin.

• The perinychium includes the nail, the nailbed, and the surrounding tissue.
• The paronychia is the lateral nail folds
• The hyponychium is the palmar surface skin distal to the nail.
• The lunula is that white semi-moon shaped proximal portion of the nail.
• The sterile matrix is deep to the nail, adheres to it and is distal to the lunule.
• The germinal portion is proximal to the matrix and is responsible for nail growth.