KEY FACTS Terminology Persistent stapedial artery (PSA): Rare congenital vascular anomaly in which embryological stapedial artery persists You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Aberrant internal carotid artery (AbICA): Congenital vascular anomaly resulting from failure of formation of extracranial ICA with arterial collateral pathway You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Oval window atresia (OWA): Absent space between lateral semicircular canal above and cochlear promontory below associated with anomalous stapes and malpositioned CNVII You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Major anomaly: Anomaly of middle and external ear Minor anomaly: Isolated middle ear (ME) anomaly Ossicular fixation: Congenital ankylosis; rigid bar or fibrous band connects ossicle to wall of ME Ossicular malformation: Anomaly in shape, size, &/or orientation of ossicle Columellar stapes: 1 central, broad stapedial crus You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles…
KEY FACTS Terminology Definition: Cholesteatoma in mastoid secondary to epithelial rest You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
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KEY FACTS Terminology Squamous cell carcinoma (SCCa) of external ear with spread to external auditory canal (EAC); T-bone carcinoma You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Definition: Benign overgrowth of bony external auditory canal (EAC) in response to chronic cold water exposure You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Osteoma: Rare, benign, focal, pedunculated, bony overgrowth of osseous external auditory canal (EAC) with normal overlying squamous epithelium You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology External auditory canal cholesteatoma (EACC) EACC: EAC erosive lesion composed of exfoliated keratin within stratified squamous epithelium You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Medial canal fibrosis (MCF) Discrete clinicopathological disease characterized by formation of fibrous tissue in medial aspect of bony external auditory canal (EAC) You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Keratosis obturans (KO): Abnormal accumulation & obstruction of bony external auditory canal (EAC) from desquamated keratin without erosive bony changes You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Necrotizing external otitis (NEO); "malignant" otitis externa or skull base osteomyelitis NEO definition: Severe invasive infection of external auditory canal (EAC), adjacent soft tissues, and skull base You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
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KEY FACTS Terminology Synonyms: Foramen of Huschke; tympanic bone dehiscence Definition: Developmental ossification defect in anteroinferior aspect of bony external auditory canal (EAC) Should be considered normal EAC variant You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
Summary Thoughts: Temporal Bone The temporal bone (T-bone) is one of the most complex and intriguing areas of the head and neck. Understanding normal anatomy is key to accurate T-bone image interpretation. Incorporating the otologic findings of a middle ear mass also helps the clinician to arrive at a correct preoperative diagnosis. If the clinical question is conductive hearing loss (CHL), an abnormality on CT is…
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KEY FACTS Terminology Central upper midface fracture complex involving confluence of medial and upper maxillary buttresses and their posterior extensions Disruption of medial canthal regions, ethmoids, and medial orbital walls You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology Synonyms: Facial smash injury, panfacial fracture No widely accepted definition Severely comminuted fractures involving multiple facial bones Does not follow pattern described for traditional transfacial (Le Fort) fracture You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you are a member. Log in here
KEY FACTS Terminology ZMC definition: Fracture complex with fracture lines involving zygomatic arch, lateral orbital wall, anterior & lateral walls of maxillary sinus, & orbital floor Previously called trimalar or tripod fracture; ZMC fracture terminology most accurate as fracture involves lateral orbital wall along zygomaticosphenoid suture You’re Reading a Preview Become a Clinical Tree membership for Full access and enjoy Unlimited articles Become membership If you…