Answers:
What is cochlear otosclerosis?
A) When otosclerosis causes CHL
B) When otosclerosis causes SNHL
C) Stiffening of cochlear basal membrane
D) Stiffening of the stapes footplate
E) None of the above
MC Questions:
A medical student comes to your office because his friend was practicing his head and neck exam on him and noticed "there's something in you ear!". On routine exam you notice chalky white patches present on the TM bilaterally. The patient denies any hearing loss, otalgia or otorrhea. What is the most likely diagnosis?
A)Cholesteatoma
B)Myringosclerosis
C) Otomycosis
D)Otitis Externa
A) When otosclerosis causes CHL
B) When otosclerosis causes SNHL
C) Stiffening of cochlear basal membrane
D) Stiffening of the stapes footplate
E) None of the above
Otosclerosis is due to abnormal bone turnover in the labyrinthine bone of the inner ear which causes stiffening and eventual fixation of the stapes footplate to the oval window. This causes a CHL. It can be treated with Stapedectomy. Otosclerosis located in the otic capsule involving the cochlear endosteum and causing SNHL is called cochlear otosclerosis.
What amount of hearing loss is expected when the canal is impacted with cerumen?
Expect a loss of ~30-40 dB.
A medical student comes to your office because his friend was practicing his head and neck exam on him and noticed "there's something in you ear!". On routine exam you notice chalky white patches present on the TM bilaterally. The patient denies any hearing loss, otalgia or otorrhea. What is the most likely diagnosis?
A)Cholesteatoma
B)Myringosclerosis
C) Otomycosis
D)Otitis Externa
Free Response Question:
Name 3 of the classic signs and/or symptoms of cholesteatoma.
Quick Facts:
Cholesteatomas cause CHL by either mass effect (increased mass of TM or ossicles thus impairing movement) or by causing erosion of the middle ear ossicles leading to ossicular discontinuity. Stiffening of the stapes footplate is caused by otosclerosis.
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