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CT temporal bone axial - labeling questions

Case contributed by Craig Hacking
Diagnosis not applicable

Normal CT temporal bone

Annotated image

The labeled structures are (excluding the correct side):

  1. sphenozygomatic suture
  2. styloid process
  3. temporomandibular joint
  4. mastoid air cell
  5. mastoid process
  6. mandibular condyle
  7. clivus­­
  8. hypoglossal canal
  9. cartilaginous external auditory canal
  10. pharyngotympanic tube
  11. stylomastoid foramen
  12. pars vascularis of jugular foramen
  13. occipitomastoid suture
  14. carotid canal
  15. jugular spine
  16. hypotympanum
  17. carotid plate
  18. osseous external auditory canal
  19. pars nervosa of jugular foramen
  20. tympanic membrane
  21. mastoid segment of the chorda tympani
  22. tensor tympani muscle
  23. mastoid segment of the facial nerve
  24. mesotympanum
  25. manubrium of the malleus
  26. basal turn of the cochlea
  27. cochlear promontory
  28. petroclival fissure
  29. cochlear aqueduct
  30. apical turn of the cochlea
  31. long process of the incus
  32. round window niche
  33. facial recess
  34. sinus tympani
  35. pyramidal eminence
  36. cochleariform process
  37. posterior (second) genu of the facial nerve
  38. stapes
  39. head of malleus
  40. anterior (first) genu of the facial nerve
  41. short process of the incus
  42. oval window
  43. incudomalleolar joint
  44. middle turn of the cochlea
  45. tympanic segment of the facial nerve
  46. saccule of the vestibule
  47. aditus ad antrum
  48. labyrinthine segment of the facial nerve
  49. internal auditory canal (meatus)
  50. utricle of the vestibule
  51. Bill's bar
  52. lateral semicircular canal
  53. porus acousticus
  54. mastoid antrum
  55. vestibular aqueduct
  56. posterior semicircular canal
  57. superior semicircular canal
  58. sigmoid groove
  59. occipitomastoid suture

Normal temporal bone no labels

ct

The same normal temporal bone CT without labels for reference.

Case Discussion

The labeled structures are (excluding the correct side):

  1. sphenozygomatic suture
  2. styloid process
  3. temporomandibular joint
  4. mastoid air cell
  5. mastoid process
  6. mandibular condyle
  7. clivus­­
  8. hypoglossal canal
  9. cartilaginous external auditory canal
  10. pharyngotympanic tube
  11. stylomastoid foramen
  12. pars vascularis of jugular foramen
  13. occipitomastoid suture
  14. carotid canal
  15. jugular spine
  16. hypotympanum
  17. carotid plate
  18. osseous external auditory canal
  19. pars nervosa of jugular foramen
  20. tympanic membrane
  21. mastoid segment of the chorda tympani
  22. tensor tympani muscle
  23. mastoid segment of the facial nerve
  24. mesotympanum
  25. manubrium of the malleus
  26. basal turn of the cochlea
  27. cochlear promontory
  28. petroclival fissure
  29. cochlear aqueduct
  30. apical turn of the cochlea
  31. long process of the incus
  32. round window niche
  33. facial recess
  34. sinus tympani
  35. pyramidal eminence
  36. cochleariform process
  37. posterior (second) genu of the facial nerve
  38. stapes
  39. head of malleus
  40. anterior (first) genu of the facial nerve
  41. short process of the incus
  42. oval window
  43. incudomalleolar joint
  44. middle turn of the cochlea
  45. tympanic segment of the facial nerve
  46. saccule of the vestibule
  47. aditus ad antrum
  48. labyrinthine segment of the facial nerve
  49. internal auditory canal (meatus)
  50. utricle of the vestibule
  51. Bill's bar
  52. lateral semicircular canal
  53. porus acousticus
  54. mastoid antrum
  55. vestibular aqueduct
  56. posterior semicircular canal
  57. superior semicircular canal
  58. sigmoid groove
  59. occipitomastoid suture

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