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Notes in 06 Temporal bone, lateral skull base & posterior skull base

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Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe temporal bone can be anatomically and functionally divid…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe {{c1::labyrinth}} of the ear is composed of the cochlea,…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseTemporal bone has an osseous wall, known as the {{c2::bony l…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe {{c1::external (outer)}} ear is composed of the auricle …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe EAC is a tube surrounded by {{c1::fibrocartilage}} (late…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe bony part of the EAC is bordered posterosuperiorly …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMastoidectomy procedures are distinguished by whether the po…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe tympanic part of the temporal bone develops in parts tha…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseIncomplete fusion of the tympanic part of the temporal bone …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BasePatent foramen of {{c2::Huschke (foramen tympanicum)}} is a …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseSound waves vibrate the tympanic membrane, which transmits {…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe tympanic membrane is divided into the pars {{c1::tensa}}…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCongenital {{c1::aural atresia/stenosis}} is characterized b…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCongenital aural atresia/stenosis is often associated with m…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseExternal and middle ear malformations are related by their d…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseAural atresia can be a part of several syndromes involving t…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCase: Ear pain in a surferBroad-based bony exostosis in bila…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::EAC exostosis (aka surfer’s ear)}} is a non-neoplastic…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseEAC exostosis (aka surfer’s ear) is more often {{c1::sessile…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMost common osseous neoplasm of the temporal bone → {{c1::EA…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseEAC osteoma is more often {{c1::pedunculated::sessile/pedunc…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Necrotizing otitis externa (aka malignant otitis exter…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMost common risk factor for Necrotizing otitis externa (aka …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseOtitis externa, (aka swimmer’s ear) is most commonly due to …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseImaging of otitis externa shows EAC soft tissue {{c1::thicke…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseNecrotizing otitis externa shows {{c1::cortical bone erosion…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseChronic otitis externa can result in {{c1::medial canal fibr…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Keratosis obturans}} is an accumulation of {{c2::kerat…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseKeratosis obturans is more often seen in {{c1::young adults …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseKeratosis obturans often shows {{c3::bilateral::unilateral/b…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c2::Cholesteatoma}} is a collection of {{c1::keratin}} lin…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseEAC cholesteatoma more often occurs in {{c1::middle-aged to …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe most common external ear malignancies are {{c1::skin can…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseWithin the EAC, the most common malignancy is {{c1::squamous…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseSquamous cell carcinoma of the EAC shows an {{c2::enhancing}…
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Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe middle ear (tympanic) cavity or cleft can be subdivided …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe middle ear contains the:Ossicles (malleus, incus, and st…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe borders of the Middle ear (tympanic) cavity:Lateral wall…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe tympanic membrane is attached to the {{c1::manubrium (ha…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe footplate of the stapes acts as a piston on the {{c1::ov…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseSound energy enters through the {{c1::oval}} window, then is…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe tegmen tympani is part of the floor of the {{c1::middle …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe aditus (opening) to the mastoid antrum leads to the {{c1…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe jugular plate of the middle ear covers the jugular {{c1:…
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Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseBlue line = {{c1::tympanic membrane}}
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseRed line = {{c1::incudomalleolar joint}}
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseOrange space = {{c1::Prussak's space}}
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseGreen dash line = {{c1::Cochlear promontory}}
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMost common of red retrotympanic mass and pulsatile tinnitus…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Aberrant internal carotid artery}} is an enlarged coll…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseAberrant internal carotid artery on CT shows:- Dehiscent {{c…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCase: Red tympanic mass and pulsitile tinnitusYellow arrows:…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Lateralized}} internal carotid artery involves lateral…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseIn Lateralized internal carotid artery, the inferior tympani…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BasePersistent {{c1::stapedial}} artery is a branch of the {{c2:…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseWhat is the natural course of the embryonic stapedial artery…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BasePersistent stapedial artery on CT shows the following:Soft t…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseWith a persistent stapedial artery, the foramen {{c1::spinos…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BasePulsatile tinnitus can be caused by venous variants of the {…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseVenous variants of the jugular {{c2::bulb}} can cause pulsat…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseSigmoid sinus or Jugular bulb {{c1::dehiscence}} refers to a…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseSigmoid sinus or Jugular bulb {{c1::diverticulum}} refers to…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::High-riding jugular bulb}} describes when the dome of …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseEncroachment on middle and inner ear structures may result i…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMost common primary middle ear tumor → {{c1::Paraganglioma}}
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseParagangliomas clinically present with {{c1::pulsatile tinni…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseParagangliomas are extra-{{c1::adrenal}} neoplasms of {{c2::…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMost Paragangliomas in the head and neck arise from {{c1::pa…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMost Paragangliomas are {{c1::benign (some can be locally ag…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMost head & neck Paragangliomas are sporadic, but a sign…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseParagangliomas tend to occur in a few locations in the head …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Glomus tympanicum}} tumor is a paraganglioma isolated …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseIn Glomus tympanicum tumor, the jugular plate is {{c1::prese…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Glomus jugulotympanicum}} tumor describes a paragangli…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseIn Glomus jugulotympanicum tumor, the jugular plate is {{c1:…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseParagangliomas are highly {{c1::vascular}}, {{c2::avidly::av…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseLarger paragangliomas on MRI show the classic {{c1::salt and…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseWith paragangliomas, preoperative {{c1::angiography}} with t…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCase: Red retrotympanic mass, pulsatile tinnitusYellow arrow…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseParagangliomas are neuroendocrine tumors that express {{c1::…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMost sensitive imaging modality for detection of Paraganglio…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCase: Conductive hearing loss, white middle ear massSoft tis…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Cholesteatoma}} is a mass of exfoliated {{c2::keratin}…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseDo Cholesteatomas contain cholesterol crystals or fat?{{c1::…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCholesteatomas are among the causes of {{c1::conductive}} he…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCholesteatomas are classified by etiology into {{c1::acquire…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseAcquired cholesteatoma represents the vast majority of chole…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c3::Primary::primary/secondary}} acquired cholesteatoma oc…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Secondary::primary/secondary}} acquired cholesteatoma …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Congenital::acquired/congenital}} cholesteatoma is unc…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCongenital cholesteatoma presents in {{c1::children::demogra…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe vast majority of Cholesteatomas occur in the {{c1::middl…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseAcquired {{c1::Pars flaccida}} cholesteatomas arise in the {…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseAcquired {{c1::pars tensa}} and {{c1::congenital}} cholestea…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCholesteatoma on CT shows a {{c1::well::well/poorly}}-circum…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseIs opacification specific for cholesteatoma?{{c1::No}}
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseIs adjacent bony erosion specific for cholesteatoma?{{c1::Ye…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCholesteatoma can show adjacent bony erosion of the ossicles…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCholesteatoma can show adjacent bony erosion of the middle e…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseFor detection of Cholesteatoma, CT is more {{c1::sensitive::…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMRI is more specific for evaluating Cholesteatoma, particula…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseSimilar to intracranial epidermoid cysts, Cholesteatomas are…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCase: White mass in middle earT1 (top left): iso- to slightl…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCase: HemotympanumYellow arrows: Lobulated T1 hyperintense (…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCholesterol granuloma is a unique type of {{c1::granulation}…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCholesterol granuloma on histologically shows a {{c1::giant …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCholesterol granulomas are most commonly located in a {{c1::…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCholesterol granulomas in the middle ear may present on otos…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCholesterol granuloma can expand and {{c1::thin}} the surrou…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCholesterol granuloma on MRI are T1 {{c2::hyper}}intense due…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseDo Cholesterol granulomas contain cholesterol crystals?…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Otomastoiditis}} refers to infection or inflammation i…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseFluid in the middle ear and mastoid is {{c1::not specific::s…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseOtomastoiditis is a clinical diagnosis, while imaging is res…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Coalescent mastoiditis}} is an advanced acute mastoidi…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseOsteitis on CT shows resorption of {{c1::bony septae}} and m…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Subperiosteal}} abscess results from {{c2::coalescent}…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseA subperiosteal abscess that erodes through the periosteum i…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseErosion through the mastoid tip can result in abscess tracki…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseErosion through the mastoid tip can result in abscess tracki…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMain cause of mortality in acute and chronic otomastoiditis …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseIntratympanic sequelae of chronic otitis media that can cont…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseWithin the temporal bone, the Facial nerve (CN VII) can be d…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseLabyrinthine segment of the Facial nerve courses from intern…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseLabyrinthine segment of the Facial nerve gives off the {{c1:…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseTympanic (horizontal) segment of the Facial nerve courses {{…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMastoid (descending) segment of the Facial nerve courses {{c…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMastoid (descending) segment of the Facial nerve gives off t…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe portions of Facial nerve that may normally {{c1::enhance…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseIt is abnormal to have Facial nerve enhancement {{c1::proxim…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCase: Facial nerve palsyYellow arrows: subtle enlargement of…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseWithin the temporal bone, Facial nerve schwannomas tend to b…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe majority (70%) of patients with Facial nerve schwannoma …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseLarger Facial nerve schwannomas can interfere with ossicular…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseFacial nerve schwannomas on CT show bony canal {{c1::enlarge…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseFacial nerve schwannomas on MRI show {{c1::brisk}} contrast …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseFacial nerve venous malformations are perineural vascular le…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseFacial nerve venous malformation is most commonly seen in th…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseFacial nerve venous malformations on CT show an {{c1::expans…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseFacial nerve venous malformations on MR show {{c1::hetero::h…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCase: Facial weakness, hearing loss, rashYellow arrow: right…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe DDx for abnormal enhancement of the Facial nerve (CN VII…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseMost common syndrome of acute-onset, unilateral facial weakn…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseBell palsy (idiopathic facial neuropathy) is due to HSV-1 re…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseIs imaging routinely performed with suspicion of Bell palsy …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe majority of patients with Bell palsy (Idiopathic facial …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseBell palsy on MRI shows {{c2::uniformly::pattern}} enhancing…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseRamsay Hunt syndrome typically shows enhancement of the faci…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseLyme disease is caused by {{c1::Borrelia burgdorferi:bacteri…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseLyme disease clinically presents with a rash, {{c1::arthriti…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseParotid cancers (eg, lymphoma, adenoid cystic carcinoma) and…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BasePerineural tumor spread along the facial nerve occurs more f…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BasePerineural tumor spread along the facial nerve on MRI shows …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BasePerineural tumor spread along the facial nerve on MRI shows …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe inner ear is situated within the {{c1::petrous}} portion…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Otic capsule}} is the osseous superstructure containin…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Cochlea}} is a conical structure consisting of a bony …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseModiolus contains cells of the {{c1::spiral}} ganglion and c…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe spiral of the cochlea is separated by osseous spiral lam…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe scala {{c1::media (aka cochlear duct)}} separates the sc…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseScala media (aka cochlear duct) contains {{c1::endo}}lymph a…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseScala tympani and scala vestibuli contain {{c1::peri}}lymph …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseHydraulic pressure created in the {{c1::peri}}lymph by the v…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BasePressure waves descend back to the basal turn through the sc…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Cochlear aqueduct (aka cochlear canaliculus)}} extends…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Cochlear aqueduct (aka cochlear canaliculus)}} allows …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseVestibule is an ovoid perilymphatic space, continuous with t…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c2::Vestibular aqueduct}} connects the {{c1::crus commune}…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull Base{{c1::Crus commune}} is the common channel of the superior a…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseEndolymphatic {{c1::duct}} arises from the {{c2::utricle}} a…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseThe endolymphatic sac acts as a reservoir for endolymph and …
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCongenital anomalies of the Inner ear are divided into malfo…
Published 05/01/2023 NeuroImaging: Head & Neck: Temporal Bone/Lateral Skull Base & Posterior Skull BaseCase: Congenital cochlear dysplasiaYellow arrow: Cochlear hy…
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