CT facial bones/orbits axial - labeling questions

Case contributed by Dr Craig Hacking
Annotated image

Normal CT facial bones (with labels)

The labeled structures are (excluding the correct side):

  1. groove for the middle meningeal artery
  2. frontal sinus
  3. frontal crest
  4. orbital process of the frontal bone
  5. foramen cecum
  6. superior rectus muscle
  7. crista galli
  8. olfactory fossa
  9. anterior ethmoidal foramen
  10. lesser wing of the sphenoid bone
  11. globe
  12. lamina papyracea
  13. superior olfactory recess
  14. middle ethmoidal sinus
  15. optic nerve
  16. posterior ethmoidal foramen
  17. lateral rectus muscle
  18. posterior ethmoidal sinus
  19. superior orbital fissure
  20. anterior clinoid process
  21. agger nasi (anterior-most ethmoidal sinus)
  22. optic canal
  23. perpendicular plate of the ethmoid bone
  24. ethmoid bulla (bulla ethmoidalis)
  25. medial rectus muscle
  26. posterior clinoid process
  27. dorsum sellae
  28. nasal bone
  29. nasomaxillary suture
  30. sphenoethmoidal recess
  31. inferior rectus muscle
  32. sella turcica (pituitary fossa)
  33. temporalis muscle
  34. inferior orbital fissure
  35. nasolacrimal canal
  36. foramen rotundum
  37. concha bullosa
  38. middle nasal turbinate (concha)
  39. temporal process of the zygomatic bone
  40. internal auditory (acoustic) canal
  41. sphenopalatine foramen
  42. pterygomaxillary fissure
  43. sphenoid sinus
  44. carotid canal
  45. maxillary sinus (antrum)
  46. zygomatic process of the temporal bone
  47. mandibular condyle
  48. infraorbital canal
  49. pterygopalatine fossa
  50. foramen ovale
  51. temporomandibular joint
  52. foramen spinosum
  53. nasal process of the maxilla
  54. inferior nasal turbinate (concha)
  55. lateral pterygoid plate
  56. coronoid process of the mandible
  57. greater palatine canal
  58. medial pterygoid plate
  59. condylar neck of the mandible
  60. lateral pharyngeal recess (fossa of Rosenmuller)
  61. lateral pterygoid muscle
  62. opening of the pharyngotympanic (Eustachian) tube
  63. nasopharynx
  64. anterior nasal spine
  65. posterior nasal spine
  66. torus tubarius
  67. palatine process of the maxilla
  68. median palatine suture
  69. transverse palatine suture
  70. horizontal plate of the palatine bone
  71. greater palatine foramen
  72. lesser palatine foramina
  73. masseter muscle
  74. medial pterygoid muscle
  75. incisive canal
  76. mandibular foramen
  77. incisive foramen
  78. pterygoid hamulus
  79. lingula of the mandible
  80. styloid process
  81. oropharynx
  82. uvula
  83. anterior arch of the atlas (C1)
  84. transverse foramen of the atlas (C1)
  85. odontoid process of the axis (C2)
  86. lateral mass of the atlas (C1)
  87. ramus of the mandible
  88. angle of the mandible
  89. mandibular canal
  90. body of the mandible
  91. mental foramen
  92. greater cornu of the hyoid bone
  93. epiglottis
  94. vallecula
  95. median glossoepiglottic fold
  96. genial tubercle
  97. lateral glossoepiglottic fold
  98. lesser cornu of the hyoid bone
  99. body of the hyoid bone
CT

Normal CT facial bones (without labels)

The same normal facial bones CT without labels for reference.

Case Discussion

The labeled structures are (excluding the correct side):

  1. groove for the middle meningeal artery
  2. frontal sinus
  3. frontal crest
  4. orbital process of the frontal bone
  5. foramen cecum
  6. superior rectus muscle
  7. crista galli
  8. olfactory fossa
  9. anterior ethmoidal foramen
  10. lesser wing of the sphenoid bone
  11. globe
  12. lamina papyracea
  13. superior olfactory recess
  14. middle ethmoidal sinus
  15. optic nerve
  16. posterior ethmoidal foramen
  17. lateral rectus muscle
  18. posterior ethmoidal sinus
  19. superior orbital fissure
  20. anterior clinoid process
  21. agger nasi (anterior-most ethmoidal sinus)
  22. optic canal
  23. perpendicular plate of the ethmoid bone
  24. ethmoid bulla (bulla ethmoidalis)
  25. medial rectus muscle
  26. posterior clinoid process
  27. dorsum sellae
  28. nasal bone
  29. nasomaxillary suture
  30. sphenoethmoidal recess
  31. inferior rectus muscle
  32. sella turcica (pituitary fossa)
  33. temporalis muscle
  34. inferior orbital fissure
  35. nasolacrimal canal
  36. foramen rotundum
  37. concha bullosa
  38. middle nasal turbinate (concha)
  39. temporal process of the zygomatic bone
  40. internal auditory (acoustic) canal
  41. sphenopalatine foramen
  42. pterygomaxillary fissure
  43. sphenoid sinus
  44. carotid canal
  45. maxillary sinus (antrum)
  46. zygomatic process of the temporal bone
  47. mandibular condyle
  48. infraorbital canal
  49. pterygopalatine fossa
  50. foramen ovale
  51. temporomandibular joint
  52. foramen spinosum
  53. nasal process of the maxilla
  54. inferior nasal turbinate (concha)
  55. lateral pterygoid plate
  56. coronoid process of the mandible
  57. greater palatine canal
  58. medial pterygoid plate
  59. condylar neck of the mandible
  60. lateral pharyngeal recess (fossa of Rosenmuller)
  61. lateral pterygoid muscle
  62. opening of the pharyngotympanic (Eustachian) tube
  63. nasopharynx
  64. anterior nasal spine
  65. posterior nasal spine
  66. torus tubarius
  67. palatine process of the maxilla
  68. median palatine suture
  69. transverse palatine suture
  70. horizontal plate of the palatine bone
  71. greater palatine foramen
  72. lesser palatine foramina
  73. masseter muscle
  74. medial pterygoid muscle
  75. incisive canal
  76. mandibular foramen
  77. incisive foramen
  78. pterygoid hamulus
  79. lingula of the mandible
  80. styloid process
  81. oropharynx
  82. uvula
  83. anterior arch of the atlas (C1)
  84. transverse foramen of the atlas (C1)
  85. odontoid process of the axis (C2)
  86. lateral mass of the atlas (C1)
  87. ramus of the mandible
  88. angle of the mandible
  89. mandibular canal
  90. body of the mandible
  91. mental foramen
  92. greater cornu of the hyoid bone
  93. epiglottis
  94. vallecula
  95. median glossoepiglottic fold
  96. genial tubercle
  97. lateral glossoepiglottic fold
  98. lesser cornu of the hyoid bone
  99. body of the hyoid bone
PlayAdd to Share

Case information

rID: 62714
Published: 29th Aug 2018
Last edited: 14th Aug 2019
System: Head & Neck
Inclusion in quiz mode: Included

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.