Hand and finger diagnoses

Background

Wrist and hand deeper palmar dissection
Distal interphalangeal dislocation (DIP), proximal interphalangeal dislocation (PIP), and metacarpophalangeal dislocation (MCP) joints of the finger shown.
Volar/anterior finger anatomy.
Lateral finger anatomy.

Hand Anatomy

  • Volar = anterior = dorsal
  • Dorsal = posterior = palmar

Nailtip Anatomy

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.

Clinical Features

Hand and finger diagnoses

Hand and Finger Infections Images

Differential Diagnosis

Hand and finger injuries

Hand and finger dislocations

Hand and finger infections

Look-Alikes

Distal Finger (Including Nail) Injury

Evaluation

Management

Disposition

See Also

External Links

References