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CT Temporal Bone

CT Temporal Bone. Ajay Malhotra. TMJ Tensor tympani Cochleariform process Carotid canal Eustachian tube. Epitympanum. Tensor tympani Cochleariform process Carotid canal. Mesotympanum. Tensor tympani Cochleariform process Carotid canal Geniculate ganglion Cochlea apex

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CT Temporal Bone

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  1. CT Temporal Bone Ajay Malhotra

  2. TMJ Tensor tympani Cochleariform process Carotid canal Eustachian tube

  3. Epitympanum Tensor tympani Cochleariform process Carotid canal Mesotympanum

  4. Tensor tympani Cochleariform process Carotid canal Geniculate ganglion Cochlea apex Tegmen tympani Koerner’s septum Epitympanum TM Mesotympanum

  5. Tensor tympani Carotid canal Malleus-Head Lateral process Manubrium Cochlea Scutum Prussak’s space Tegmen tympani Koerner’s septum TM Mesotympanum

  6. Scutum Prussak’s space Tensor tympani Facial nerve Malleus- Head Manubrium Incus- Body Cochlea Tegmen tympani Mesotympanum TM

  7. Facial nerve Cochlea-basal turn Cochlear promontory Tegmen tympani Incus-Body Long process IAC

  8. IAC Crista falciformis Facial nerve Cochlea basal turn Cochlear promontory Scutum Tegmen tympani

  9. Incus- Body long process Facial nerve Crista falciformis Scutum Tegmen tympani Vestibule SSCC Cochlea Cochlear promontory IAC

  10. Epitympanum Incus-short process Incudal fossa Stapes Oval window Cochlear promontory Vestibule Facial nerve SSCC LSCC Arcuate eminence IAC Mesotympanum

  11. Aditus ad antrum Incudal fossa Vestibule Oval window Round window niche SSCC LSCC Arcuate eminence Aditus ad antrum IAC EAC

  12. Sinus tympani Facial nerve Vestibule SCCC LSCC Jugular tubercle Antrum JF Hypotympanum HC

  13. Antrum Vestibule SSCC LSCC Facial nerve

  14. SSCC LSCC Facial nerve

  15. Antrum Vestibule SSCC LSCC Facial nerve Vestibular aqueduct Mastoid

  16. Antrum PSCC Vestibular aqueduct

  17. Mandibular condyle Caroticojugular spine Facial nerve Stylomastoid foramen CC JF HC Mastoid

  18. Facial nerve Caroticojugular spine CC JF

  19. Facial nerve CC JF

  20. Facial nerve CC JF

  21. Glenoid fossa Jugular spine Pars vascularis Pars nervosa Eustachian tube Tympanic membrane Jugular plate Facial nerve CC JF

  22. Mesotympanum Malleus-manubrium Facial nerve Eustachian tube Cochlear aqueduct Jugular plate Facial recess Pyramidal eminence Sinus tympani Cochlea-basal turn CC EAC JF

  23. Malleus-manubrium Cochlea-basal turn Cochlear promontory Round window niche Sinus tympani Pyramidal eminence

  24. Facial nerve Pyramidal eminence Sinus tympani Stapedius muscle Malleus Incus-long process Cochlea Cochlear aqueduct

  25. Tensor tympani Stapes Sinus tympani Vestibule Cochlea Facial nerve PSCC

  26. Incudomalleal joint Modiolus Vestibule Facial nerve Modiolus

  27. Epitympanum Facial nerve Geniculate ganglion Incudomalleal joint Cochlea Vestibule LSCCVestibular aqueduct Aditus ad antrum IAC Antrum

  28. Geniculate ganglion Cochlea Vestibule Vestibular aqueduct IAC Antrum

  29. Koerner’s septum Gasserian notch SSCC

  30. Anatomical Basis of Temporal Bone Disease VIIth CN Schwannoma Hemangioma Malignant parotid Cholesteatoma VIIIth CN Schwannoma Meningioma Glomus Tympanicum Carcinoma- Squamous/Adeno Malignant Otitis Externa Glomus jugulare Schwannoma Meningioma

  31. VIIth Schwannoma Hemangioma Malignant parotid Epidermoid CG Mucocele ICA Aneurysm Metastases Plasmacytoma Chondroid tumor Cholesteatoma Endolymphatic sac tumor

  32. Key Difference: • A cholesteatoma will have bony erosion/expansion, especially of the scutum and middle ear ossicles. • Otitis media erodes the middle ear ossicles only about 5% of the time.

  33. Transverse fracture Longitudinal fracture

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