Thumb Distal Phalanx Anatomy

  • The thumb distal phalanx supports the nailbed, hard nail plate (thumb nail) and thumb pulp.
  • The distal phalanx is the insertion site for the extensor pollicis longus and the flexor pollicis longus.
Diagrams & Photos
  • Thumb Distal Phalanx Bone Anatomic View
    Thumb Distal Phalanx Bone Anatomic View
  • Thumb Distal Phalanx Bone Diagrammatic View
    Thumb Distal Phalanx Bone Diagrammatic View
  • Thumb Distal Phalanx Bone X-ray View
    Thumb Distal Phalanx Bone X-ray View
Key Points
  • Chronic paronychial infection can lead to osteomyelitis of the distal phalanx.
Anatomy References
Anatomic Abbreviations
Hand Surgery Resource Anatomy Diagnostic Guide (Chapter)