Temporal Bone Flashcards
Modality of choice for evaluating outer and middle ear
CT scan
It is better for evaluating inner ear and the nerve
MRI
Modality for conductive problem
CT scan
Modality for sensory neuron problems
MRI
Two views to assess the temporal bone
1st -Axial view
2nd - coronal view
It is better for evaluating ossicles, tympanic cavity, and mastoid air cells and is better in tracing the more peripheral portions of facial nerve
CT scan
Used to differentiate CN VII from CN VIII
MRI
Used in assessing for Schwannoma
MRI
Used in assessing tympanomastoiditis
CT scan
Recurrent otitis media with tympanic membrane rupture.
Cholesteatoma
Describe cholesteatoma
There is ingrowth of squamous epithelium through ear drum. There is accumulation of squamous and keratin debris within middle ear. It erodes bony walls and ossicles.
It is an aggressive inflammatory process that becomes a mass but it is NOT a cancer
Cholesteatoma
To view the normal insertion of temporomandibular joint in the fossa, you will use what modality?
CT scan
It is secondary to chronic periodontal infections
TMJ ankylosis
What kind of view are you going to request if you’re looking for trauma in the TMJ?
Opaque views of mandible or better if panoramic view of mandible
