CT wrist sagittal - labeling questions

Case contributed by Craig Hacking
Diagnosis not applicable

Normal CT wrist (with labels)

Annotated image

The labeled structures are (excluding the correct side):

  1. styloid process of ulna
  2. pisiform
  3. base of fifth metacarpal
  4. fifth carpometacarpal joint
  5. fovea
  6. triquetrum
  7. ulnar head
  8. base of fourth metacarpal
  9. hamate
  10. fourth carpometacarpal joint
  11. hook of hamate
  12. base of third metacarpal
  13. third carpometacarpal joint
  14. lunocapitate joint
  15. capitate
  16. radiolunate joint
  17. head of capitate
  18. ulnar peak of dorsal (Lister's) tubercle of distal radius
  19. carpal boss of third metacarpal
  20. lunate
  21. lunate fossa of distal radius
  22. radial peak of dorsal (Lister's) tubercle of distal radius
  23. proximal pole of scaphoid
  24. radioscaphoid joint
  25. tubercle of trapezium
  26. trapezoid
  27. waist of scaphoid
  28. scaphotrapeziotrapezoid (triscaphe) joint
  29. distal pole of scaphoid
  30. distal radius
  31. trapezium
  32. first carpometacarpal joint
  33. tubercle of scaphoid
  34. styloid process of radius
  35. base of first metacarpal
  36. shaft of first metacarpal

Normal CT wrist (no labels)

ct

The same normal wrist CT without labels for reference.

Case Discussion

The labeled structures are (excluding the correct side):

  1. styloid process of ulna
  2. pisiform
  3. base of fifth metacarpal
  4. fifth carpometacarpal joint
  5. fovea
  6. triquetrum
  7. ulnar head
  8. base of fourth metacarpal
  9. hamate
  10. fourth carpometacarpal joint
  11. hook of hamate
  12. base of third metacarpal
  13. third carpometacarpal joint
  14. lunocapitate joint
  15. capitate
  16. radiolunate joint
  17. head of capitate
  18. ulnar peak of dorsal (Lister's) tubercle of distal radius
  19. carpal boss of third metacarpal
  20. lunate
  21. lunate fossa of distal radius
  22. radial peak of dorsal (Lister's) tubercle of distal radius
  23. proximal pole of scaphoid
  24. radioscaphoid joint
  25. tubercle of trapezium
  26. trapezoid
  27. waist of scaphoid
  28. scaphotrapeziotrapezoid (triscaphe) joint
  29. distal pole of scaphoid
  30. distal radius
  31. trapezium
  32. first carpometacarpal joint
  33. tubercle of scaphoid
  34. styloid process of radius
  35. base of first metacarpal
  36. shaft of first metacarpal

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