ENT Phase 2 Flashcards
BCC is the MC ? and most likely to occur ?
What causes incidence to increase?
How does it present on PE?
MC auricle malignancy, most often on face
Age/Exposure
Pedunculated Ulcerated Nodular Translucent
Rolled Bleeding
How is BCC Tx
What are the 3 types
Freeze Topical 5-FU
Mohs Excision Radiation Currette
Superficial spreading
Ulcerated
Nodular (morpheaform)
SCC is more common in ? PTs
What findings are indicative of advanced cases/poor prognosis
Elderly males
CN7/node involvement
What are the RFs for developing SCC
How does these appear on PE
Age Non-healing ulcer ImmSupp Chemical exposure
UV radiation
Ulcerated plaque/nodule prone to bleeds
How are SCCs Tx
Why is Tx harder
What type are more likely to metastasize
Dissection w/ parotidectomy (adv cases)
Excision
Radiation
Mohs
Aggressive SCC>BCC
Larger excision areas
Recurrent/deep ulcerations
? is the MC neoplasm of the ear canal?
When is a Dx of malignancy considered?
SCC
Otitis externa doesn’t resolve on therapy
Why is malignant melanoma so dangerous?
How does malignant melanoma look on PE?
Affects all age groups w/ high mortality rate
Pigemented lesion w/ changes to ABCDE
Moves Epidermis to Dermis
How are malignant melanomas Tx
What do the ABCDEs used for monitoring stand for?
Excision w/ lymph node dissection
Asymmetry Border Color Diameter Evolving
What is the suspected RF for malignant melanoma?
What is the classification system used to measure lesion invasion depth?
Sun exposure during childhood
Breslow:
Thin- 1mm or less
Intermediate- 1-<4mm
Thick- >4mm
PTs w/ malignant melanoma need to have skin exams to detect ? types of lesions early?
How are these cases Tx?
Darkly pigmented/bleed
Changes in ABCDE
Excision
Lymph node dissection
How does an Epidermal Inclusion Cyst appear on exam?
How are they Tx
Central punctum w/ well defined borders w/out tenderness or mobility;
+ drainage possible
Only at PT request:
Triamcinolone injection 3mg/mL
Auricular hematoma occur when blood accumulates between ? structures?
What word would be used to describe a hematoma?
Cartilage and Perichondrium- hematoma to necrosis
Fluctuant Edematous Ecchymotic Lost landmarks
What are the steps to Tx of auricular hematomas?
Any hematoma older than ? required referral
Evac hematoma
Pressure dressing/spint
ABX- Staph (Diclox/Cephalexin) or Pseudomonas (Cipro)
> 7days to ENT
Cauliflower can develop in 48-72hrs
When can/do local or regional blocks need to be used during auricular hematoma evacuation?
What are the landmarks for injection?
Local- simple lacerations
Regional: extensive, best to avoid tissue distortion
Local-
Posterior: posterior sulcus
Anterior: superior/anterior to tragus
Regional-
Superior to superior pole above tragus
When performing regional blocks for auricular hematoma evacuations, do not exceed using ? much lidocaine?
Lacerations anterior to the ear can damage ? structures but can be evaluated w/ ? imaging?
4mg/kg of 1%
CN7, Parotid
CT w/out contrast
All PTs that have ear lacerations repaired need ? final steps taken for Tx
Ear lacerations need to be referred to plastics, OMFS, ENT or neurosurgery if ? structures are involved?
Pressure dressing
ABX- quinolones
Basilar skull Fx HL EAC Avulsion Vestibular Sx
95% of Peri/chondritis cases are due to ? microbe?
How are these cases Tx?
P. aeruginosa
Mild: PO FQN w/ f/u <24hrs
Mod/Sev: IV FQN + Aminoglycoside; possible debridement
Cellulitis of the auricle must be promptly Tx to prevent ? development
Define Relapsing Polychondritis and what is done to slow progression/prevent damage
Perichondritis
Recurrent bilateral episodes of auricular erythema/edema; progresses to involve tracheobronchial tree
CCS slow progression/damage
What are the two protective factors cerumen offers?
What are the two parts of the EAC and contents of each part?
Acidic enviroment
Lipid rich/hydrophobic
Lateral 1/3- cartilage w/ hair and glandular skin
Medial 2/3- bony w/ attachment to temporal periosteum
What is the narrowest point of the EAC?
What are the 4 causes of cerumen impaction?
Isthmus
Obstruction- SLE, Crohn’s
Narrowing
Failed migration
Over production
What is the expected result for Tx of symptomatic cerumen impaction?
If Tx is needed, what are the 3 methods
Inc hearing by 10dB
Cerumenolytics
Irrigation
Manual removal
When are cerumenolytic agents safe/contradicted for use
What are 3 examples of lytic agents used?
Safe- no Hx of infection, perf, otologic surgery
No- TM damage suspected
Mineral oil
H2O2 3%
Carbamide peroxide 6.5%, max 4 days
When attempting irrigation removal of cerumen impactions, don’t insert syringe past ?
What direction is the stream aimed in?
Beyond lateral 1/3- 8mm
Posterior and upward
Cerumen impaction removed w/ irrigation have the best results when ? step out is done post-wash
When is this post-irrigation step a must?
Acidification w/ 2% acetic/boric acid or alcohol
PT is ImmComp
When should cerumen impactions be referred to ENT for removal under microscope?
PTs are classified as recurrent impactions if they have more than ? and can do ? prophylactic care to reduce impactions
TM perf
Recurrent impactions
Routine measures fail
Hx of COM/TM perf
> 1/yr in normal ear:
Cotton ball w/ mineral oil x 10-20min 1/wk
Remove inserts prior to sleep
Scheduled cleaning q6-12mon
Cerumen impaction are most often due to ?
Drying of the EAC after cleaning/removal is important to prevent development of ?
Self induced cleaning attempts
Otitis externa
Foreign bodies in the ear present w/ ? Sxs
What may happen if persistent object retention occurs?
Pain Pruritus CHL Bleeding
Infection
Tissue granulation
MC ear foreign bodies get lodged in ? area
How are insects best killed?
Lateral EAC
Olive oil
3% lidocaine
How do Peds PTs w/ foreign objects lodged in the nose present?
What Tx attempt can be done prior to considering surgical removal?
Unilateral purulent rhinorrhea
Topical anesthetic
Vasoconstrictive nose drops
How does Otitis Externa present
When is this Dx a concern for a dangerous future sequelae?
Painful erythem/edema of the canal skin w/ exudate
Auricle/tragus manipulation= pain
Malignant external otitis- osteomyelitis of skull base in ImmComp/DM PTs
External otitis is caused by ? microbes
Gram-pos cocci:
Staph A
Gram-neg rods:
Pseudomonas
Proteus
Fungi:
Aspergillus
Malignant external otitis is caused by ? microbe
What is the sequential path of spread?
Pseudomonas
Floor of ear canal
Middle fossa floor
Clivus
Contralateral skull base
What are the RFs for AOE?
What is the difference of TM mobility on PE between External Otitis and AOM?
Frequent/aggressive Q-tips
Water
Scratching
Lack of cerumen
EO- normal movement w/ pneumatic otoscopy
What will be seen on PE if PT has malignant external otitis?
Advanced cases can present w/ ? and CN palsy in ? nerves
How is this Dx confirmed w/ imaging
Ottorhea
Canal granulations
Deep otalgia
Periauricular/anterior adenopathy
6 7 9 10 11 12
CT showing osseous erosions
How are mild and mod/sev cases of AOE Tx?
Mild: 2% acetic acid or 50/50 isopropyl/white vinegar (swimmer’s ear w/out infxn) prevent Pseudo/Staph A growth 6.5-7.3pH
Mod:
Aminoglycoside (genta sulfate)- ototoxic, desensitizer
FQN- Cipro/Ofloxacin
When are systemic ABX needed for the Tx of AOE?
What ABX is used?
Cellulitis ImmDef DM Edema preventing topicals Radiation Hx (ear) Severe OE
Cipro
PTs being Tx for AOE need to avoid water for how long?
Any persistent otitis externa in ? two PTs need referrals
10days
ImmComp
DM
What ABX is used for Tx of malignant external otitis?
How long its Tx continued for?
Cipro
Gallium scanning proves inflammation reduction
What is the most feared complication of AOE?
What microbe causes it and how does it spread?
Malignant OE
Pseudomonas- enters DM/AIDS PT temporal bone to base of skull
Sequelae- bone infection
How are PTs w/ malignant OE Tx who fail medical therapy?
Define Exostoses and it’s AKA
Hyperbaric chamber
EAC lesion of reactive lamellar bone growth w/ broad base; Surfer’s ear from cold water exposure
Define Osteoma and their location of growth
? is the MC neoplasm of the ear canal?
EAC lesion w/ pedunculated base; a benign osseous neoplasm on tympano-squamous/mastoid line
SCC
When is a Dx of SCC brought into consideration?
Why is there such a high mortality rate?
How are they Tx
OE fails to resolve w/ therapy; obtain biopsy
Invasion of lymphatics in cranial base
Wide resection w/ radiation
What is the less lethal type of ear canal neoplasm if SCC is excluded?
What are the etiologies of dilatory ET dysfunction?
Adenomatous- grow from cerumen glands
PICA Pressure Inflammation (3rd-T pregnant) Congenital Anatomic
What are the MCC of ET dysfunction?
What are the 4 etiologies of patulous ET dysfunction?
Viral URI
Allergies
Weight loss
Atrophy
Scars
Hormone- high E, OCPs, prostate Ca Tx
What do PTs w/ dilatory ET dysfunction present w/?
What do PTs w/ patulous dysfunction present w/?
HL
TM retraction/effusion
Autophony
TM moves w/ in/expiration
How is dilatory ET dysfunction Tx
How is patulous ET dysfunction Tx?
PPIs
Antihistamines
Decongestants
Steroids
Mild- hydrate, saline spray, avoid decongestants
Sev- surgery: PE tubes and cartilage grafts
Why should PTs w/ active intranasal infection avoid from valsalva maneuvers?
What are 2 unique complaints/findings that may signal PT has patulous ET dysfunction?
Precipitates middle ear infections
Autophony worse w/ exertion, better w/ URIs
What causes serous otitis media to develop?
What is this Dx AKA?
Prolonged negative ET pressure cause trandudative formation
Otitis media w/ effusion
Serous Otitis Media is common in ? PT population?
What are the presenting S/Sxs?
How are these best Dx
Peds w/ narrow/horizontal ET
CHL w/ fullness
Dec TM mobility
Tympanometry
How are cases of Serous Otitis Media Tx
Mild HL- observe x 3mon
Meds only if seasonal allergy/URI present
If above fail, then:
PE tubes
Endoscopic widening of nasopharngeal orifice
Adenoidectomy
What are the 3 etiologies of Serous Otitis Media in adults?
At what point does the concern shift to a Ca Dx concern?
URi
Barotrauma
Chronic allergic rhinitis
> 3mon and unilateral
What are the 9 indications for PE tube placement
Autophony from PET
Severe/recurrent AOM HL > 30dB Impending OME complication Prevent/Tx barotrauma SOM x 3mon
Chronically retracted TM
Mid ear dysfunction- radiation/surgery
Craniofacial abnormalities
How does AOM present
AOM is a sequelae of ? Dx
Hypomobility of TM
Otalgia w/ URI
Erythema
ETD- inflammation/swelling
What are the modifiable RFs for AOM
What are the non-modifiable
Pacifiers
Bottles
Day care
2nd hand smoke
Craniofacial abnormalities
Allergies
What 3 bacteria are most likely to cause AOM infections?
How is it Dx
Strep Pneumo/Pyogens (GABHS)
H influenza
Pneumatic otoscopy
How is mastoid tenderness assess during AOM
How is AOM Tx
Tender= pus filled mastoid= nonsurgical
Mastoid swelling, cranial neuropathy= surgery
(SEA) Sulfonamide+Erythromycin/Amox CA Resistance- Cefaclor/Augmentin CC SE PCN allergy: Cefdinir/Ceftriaxone (mild) or Erythromycin + sulfonamide (severe)
Why/how are tymapnocentesis done for AOM
When would this procedure be indicated?
Why would surgical drainage of the middle ear via myringotomy need to be done?
Bacteria/fungi culture- 20g through inferior TM
ImmComp
Persistent/recurrent after multiple ABXs
Severe otalgia
Complications occur- mastoiditis, meningitis
What medication is used for recurrent AOM prophylaxis?
What is the final option of PTs fail prophylaxis therapy?
Criteria for Recurrent AOM Dx
Sulfamethoxazole
Amoxicillin
Indication for PE tubes
3 or more in 6mon
4 or more in 12mon
When is observation of AOM appropriate?
What is the SNAP approach?
> 2y/o
Mild otalgia
Fever <102.2
Safety Net approach to ABX Prescriptions
Why do PTs w/ AOM and Tx w/ Amoxicillin present w/ rashes?
When does AOM get re-defined as COM?
EBV infections, conduct Monospot test
2wks-3mon
Define COM
Since this Dx is due to different microbes than AOM, what can cause it to develop?
Otorrhea through TM perf
Pseudomonas
Proteus
Staph A
How does COM present to clinic
How are these cases managed/Tx
Purulent d/c, increases w/ URI/water exposure
Pain only w/ exacerbation
CHL w/ TM perf
PO Cipro- Pseudomonas coverage, chronic d/c
Oflox/CiproDex- exacerbation
Debridement and water protection
Surgery/mastoidectomy- definitive
When Tx COM w/ surgery, how is the TM repaired
What are the 6 possible complications to arise from OM?
Temporalis muscle fascia
TM perf Mastoiditis Facial paralysis Cholesteatoma- MCC ETD Otogenic meningitis Petrous apicitis Sigmoid sinus thrombosis
How are cholesteatomas Tx
What microbes are most likely to cause mastoiditis?
What ABX is used for Tx
Marsupialization and PE tubes
Mastoid bowl- canal and mastoid joined
ABX failure= myringotomy and mastoidectomy
Strep pneumo/Pyogenes
H influenzae
IV Cefazolin
Define Petrous Apicitis and how it’s Tx
This causes Gradenigo Syndrome which presents as ?
What complication can develop?
Petrous bone infected from blocked pneumatic cell tract blockage; Tx w/ petrous apicectomy
Foul d/c
Retro-orbital pain
CN6 (L abducent) palsy- no L eye abduction
Meningitis
How are TM Perfs Tx
What needs to be avoided?
Contaminated EACs- Ofloc/Cipro
Infections- PO ABX
Neomycin
Aminoglycosides
Polymyxin
Alcohol
What are the 3 layers of the TM
Chronic perfs develop is ? two layers meet first but can be corrected w/ ? procedure?
Squamous
Collagen
Cuboidal
Squamous + Cuboidal
Tympanoplasty- cigarette patch
Long standing cholesteatomas can invade and involve ? CN?
What imaging is preferred for evaluating cholesteatomas
CN8
CT
MRI if post-op eval
How does AOM/COM cause facial paraylsis
How is it Tx
Paralysis from ? etiology has a poorer prognosis
Bacteria neurotoxins
Myringotomy for drain/culture
IV ABX
COM leading to cholesteatoma
Define Sigmoid Sinus Thrombosis
What are the S/Sxs
Infection in mastoid air cells next to sigmoid sinus causing septic thrombophlebitis
Systemic sepsis
Inc ICP
How is Sigmoid Sinus Thrombosis Dx
How is it Tx
MRV
IV ABX
Internal jugular vein ligation
? is the MC intracranial complication from ear infections?
What microbes cause this and how do they pass through the body?
Otogenic meningitis
Acute SOM via hematogenous spread of:
H influenza
Strep pneumo
COM-
passes through petrosquamous suture line
Direct extension through dural plates of petrous pyramid
How do epidural abscesses from ear infections develop?
How do they present?
Direct extension from chronic infections to temporal/cerebellar lobes
ASx
Deep pain
HA
Low fever
Brain abscesses that arise in the temporal/cerebellar lobes are results of ? underlying issue
What are the most likely microbes?
Septic thrombophlebitis next to an epidural abscess
Staph A
Strep pyogenes/pneumo
Brain abscesses from ear infections are ? complications due to untreated ?
Define Tympanosclerosis
Uncommon
AOM
Dz limited to middle ear w/ hyaline/calcification deposts on TM
Define Otosclerosis
How is this Dx
Familial lesions on stapes leading to max of 60dB CHL
R/o other causes w/ CT/MRI, Weber/Rinne, Tymapnometry
How is ototsclerosis Tx
What causes barotrauma and when is it most likely to occur?
Speech discrimination, normal cochlea- amplification
Stapedectomy
Ascent- dec atmosphere pressure
Descent- inc atmosphere pressure; most likely time for trauma
What meds can be used to help prevent barotrauma?
How are PTs Tx suffering from barotrauma pain and HL when on the ground?
PO Pseudophedrine- hrs prior
Topical Phenylephrine- 1hr prior
Oxymetazoline
PE tubes
Myringotomy
PTs that chose to dive w/ URI or nasal allergies can fail to equalize and experience pain at ? depth
Divers must descend slowly to allow for equalization and prevent the development of ?
15ft
Hemotympanium
Perilymphatic fistula- burst oval window; SHL w/ vertigo
During a diving ascent, what can be the first or only Sxs of developing decompression sickness?
Why do PTs w/ TM perf Hx need to avoid diving?
SHL
Vertigo
Unequal thermal stimulus to semicircular canal= vertigo, disorientation, emesis
When do barotraumas need to be referred to ENT
What procedure can be preventive or Tx
When is ossicular damage suspected after middle ear trauma?
Blast injury
Otalgia HL Vertigo 4-5 days later
Myringotomy
CHL >30dB x 3mon
What are the two types of middle ear glomus tumors and where do they arise from?
How do these growths present to clinic and what images are needed?
Glomus tympanicum- middle ear
Glomus jugulare- jugular bulb
Pulsatile tinnitus w/ HL- MRA/MRV
Glomus tumors can grow large enough to cause cranial neuropathies in ? CNs?
How are they Tx
7 9 10 11
Surgery
Radiotherapy
How does Ramsay Hunt Syndrome present
How are they Tx
Pain oo Proportion to exam
Lesions in EAC prior to paralysis onset
Antivirals and PO steroids
TMJ issues can cause referred otalgia due to sensory invervation from ? nerves
Glossopharyngeal neuralgia is non-otologic cause of pain that presents as ? and is Tx w/ ?
5 7 9 10
Upper cervical nerves
Lancinating pain in throat/ear
Tx w/ microvascular decompression of CN9
Perilymph is similar to ? fluid
Endolymph has high amounts of ? E+ and for ? purpose
CSF
K+, auditory signal generation
The ‘otolith organ’ is made up of ? and ?
What is the similarity/difference between vertigo and dizziness
Urticle
Saccule
All vertigo= dizziness
Not all dizziness= vertigo
Vertigo is Latin for ?
What is the key to Dx of vertigo
To turn
Duration of vertigo episode
Presence/lack of HL
What are the etiologies of peripheral vertigo
BPPV Menieres Vestibular neuritis/labyrinthitis Barotrauma ETOH Dehiscence of semi-circular canals
What are the etiologies of central vertigo
? is the cardinal Sx of vestibular Dz
M SWAT MS Seizures Wernicke encephalopathy AV malformation Tumor- brainstem/cerebellum
Vertigo
Vestibular d/os causing vertigo lasting for seconds
+ / - (PF/CMV)
+ auditory Sxs:
perilymphatic fistula
- auditory Sxs:
Cupulolithiasis
Vertebrobasilar insufficiency
Migraine associated vertigo
Vestibular d/os causing vertigo lasting hours
+ auditory Sxs:
Menieres
Syphilis
Head trauma
- auditory Ss:
migraine associated vertigo
Vestibular d/os causing vertigo lasting days
+ auditory Sxs:
Labyrinthitis
Labyrinthine concussion
Auotoimmune inner ear dz
- auditory Sxs:
Vestibular neuronitis
Migraine associated vertigo
Vestibular d/os causing vertigo lasting months?
+ auditory Sxs:
Acoustic neuromas
Ototoxicity
- auditory Sxs:
MS
Cerebellar degeneration
Acute peripheral lesions will cause ? type and direction of nystagmus
Visual fixation will usually suppress these nystagmus’ except for ?
Horizontal and rotary w/ fast phase away from diseased side
Very acute peripheral lesion
CNS diseases
Since visual fixation tends to suppress nystagmus of peripheral vestibular dzs, what type of goggles are used to suppress visual fixation
Define the Fukuda Test
Frenzel
Demonstrates vestibular asymmetry w/ PT steps in place and eyes closed, consistent rotation
What is included in a persistent vertigo or suspected CNS dz work up?
What tests are used to discriminate between central or peripheral vertigo etiolgies?
MRI Audiogram Caloric stimulation ENG* (objective)/VNG Vestibular evoked myogenic potentials (VEMPs)
ENG/VNG
Characteristics of a peripheral vertigo induced nystagmus
Characteristics of central vertigo induced nystagmus
Fatigable horizontal nystagmus w/ rotary component that can be suppressed w/ visual fixation
Non-fatigable vertical nystagmus w/out latency and unsuppressed w/ visual fixation
What type of Sxs/vertigo do PTs complain of who have external ophthalmoplegia
If PT has cerebellar lesion in cerebral cortex, what can be the initial Sx they’re about to have a seizure?
Episodic vertigo in PTs w/ diplopia, maximized when looking toward greatest image separation
Vertigo
What is the theorized pathogenesis of Endolymphatic Hydrops?
What are the two known causes?
Distension of endolymphatic compartments
Syphillis
Trauma to head
What are the classic Sxs of Menieries?
If PTs present w/ the above Sxs but deny fluctuations in hearing, ? Dx is suggested
Episodic vertigo
Low frequency SNHL
Low/blowing tinnitus
Unilateral aural fullness
Migraine associated dizziness
What would caloric testing show in PTs w/ Meniere’s?
How are these PTs managed?
What is done for cases refractory to medical therapy?
Loss of thermal induced nystagmus to affected side
Acetazolamide
PO Meclizine/Diazepam
Vestibular rehab
Intratympanic CCS injection
Endolymph decompression
Vestibular ablation
What is the difference between vestibular neuritis and labyrinthitis?
What causes vestibular neurontitis
How do PTs w/ labyrinthtis present?
Labyrinthitis= + unilateral SHL
Post-URI/flu inflammation of CN8 w/out HL
Vertigo x days-week w/ HL and tinnitus
How is labyrinthitis Tx?
What meds can be used during the acute phase to reduce severity of vertigo?
Vestibular therapy ASAP
ABX (febrile/bacterial infection)
PO Meclizine
PO Diazepam
What causes BPPV
What do PTs present complaining of
How are these PTs Tx
Otoconia- Ca carbonate crystals in posterior semicircular canal/capula from trauma/vestibular neuronitis
Vertigo x1min after changes in head position
Epleys/Semont maneuver
Brandt-Daroff exercises
Avoidance of vestibular suppresants
? tests are performed to confirm Dx of BPPV in relation to ? canal is affected
Maneuvers used to Tx BPPV encourage migration of sediment to ?
? medication is used for Tx acute vertigo that is safe for pregnancy
Dix-Hall: posterior
Supine roll: lateral
Common crus of Ant/Post canals into auricular cavity
Meclizine (Antihistamine class- DOC)
When/why are benzos used for vertigo lasting hrs-days?
What anti-emetics can be used?
C/i to anticholinergic (prostatism, glaucoma)
Metoclopramide
Odansetron
Prochlorperazine
What are 3 etiologies of trauma induced vertigo?
Labyrinthine concussion- MCC of vertigo after trauma
Basilar skull Fx- vertigo and deafness on involved side
Chronic Post-Trauma vertigo from cupulolithiasis, sediment rests in ampulla of posterior semi-circular canal
How are cases of traumatic vertigo Tx
Define perilymphatic fistulas and how they can occur
Vestibular suppressant- Meclizine/Diazepam
Vestibular therapy
Perilymph leaks into middle ear via oval window; Physical injury Barotrauma Valsalva Post-stapedectomy
How do PTs w/ perilymphatic fistulas present?
How are perilymphatic fistulas Tx
Vertigo and SHL worse w/ straining
Bed rest w/ head elevation
Surgery w/ window sealing graft
How does Migrainous Vertigo present?
What type of FamHx do most of these PTs have?
Mixed etiology of-
Episodic vertigo w/ HA, Vision/motion sensitivity
Phono/Photo phobia
Hx of motion intolerance
How is Migrainous Vertigo Tx
This etiology of vertigo is similar to Meniere’s except ?
Diet/life changes
Migraine prophylaxis
No HL/tinnitus
What causes cervical vertigo to happen?
How do PTs present complaining of vertigo?
Post- neck injury (hyperextension)
Cervical disc degeneration
Vertigo triggered after assuming head position
What causes semicircular canal dehiscence
What do PTs present complaining of
Deficient bony covering over superior semi-circular canal
CHL and vertigo w/ straining/after loud noises
How does central vertigo present
Gradually more severe/debilitating
Auditory spared
Nonfatigable/latent vertical nystagmus worse w/ visual fixation
How do lesions on CN8/central audiovestibular pathways present?
How are these PTs best evaluated?
NHL w/ vertigo
Dec speech discrimination
BAER- brainstem auditory evoked responses to distinguish cochlear from neural loss
Diseases of the Central Auditory and Vestibular systems encompasses ? 3 Dxs?
Evaluation of central audiovestibular d/os usually requires ? imaging in order to see ? areas
Acoustic neuroma
Vascular compromise
MS
Enhanced MRI- IAC, cerebellopontine angle and brain
Characteristics of Acoustic Neuromas
Since almost all are unilateral, what does the discovery of bilateral tumors suggest?
Common intracranial tumors on sheath of CN8
Neurofibromatosis Type 2- meningiomas and intracranial/spinal tumors
What happens if Acoustic Neuromas are allowed to continue growth w/out interruptions?
How are they Dx
How are these cases Tx
IAC to cerebellarpontine angle and compress pons= hydrocephalus
MRI w/ contrast
ASx- observe w/ annual MRI
Sxs- excision, radiation and annual MRI
NFT-2: Bevacizumab- growth factor blocker