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Superior Semicircular Canal Dehiscence

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1.  Each of the following is true regarding superior semicircular canal dehiscence (SSCD), EXCEPT:
  1. SSCD is a rare condition
  2. SSCD never causes hearing loss
  3. Symptoms of SSCD are due to a thinning or lack of bone over the superior semicircular canal
  4. People with SSCD may experience the Tullio phenomenon
2.  The following are symptoms of SSCD, EXCEPT:
  1. Chronic dysequilibrium
  2. Ear fullness
  3. Autophony
  4. Ear pain
3.  Which of the following is not a typical symptom of SSCD?
  1. Headache
  2. Sound-induced dizziness
  3. Pulsatile tinnitus
  4. Hearing eyes move
4.  Which of the following is the cause of symptoms from SSCD?
  1. Third-window effect
  2. Blockage of round window
  3. Blockage of oval window
  4. Fixation of stapes
5.  All of the following are possible audiometric findings with SSCD, EXCEPT:
  1. Supranormal bone conduction thresholds
  2. Air-bone gap
  3. Absent acoustic reflexes
  4. Sensorineural hearing loss
6.  All of the following are possible audiological findings with SSCD, EXCEPT:
  1. Elevated SP/AP
  2. Absent cVEMP results
  3. Downbeating nystagmus on VNG positional testing
  4. Positive Tullio's test
7.  All of the following are treatment options for SSCD, EXCEPT:
  1. Tympanostomy tube insertion
  2. Round window plugging
  3. Middle fossa plugging
  4. Intratympanic steroids
8.  A condition that may mimic the symptoms of SSCD is:
  1. Meniere's disease
  2. Perilymphatic fistula
  3. Eustachian tube dysfunction
  4. All of the above
9.  Which of the following is the "gold standard" for diagnosing SSCD?
  1. Pure-tone audiogram
  2. CT temporal bones
  3. Type C tympanogram
  4. VEMP testing
10.  Which of the following symptoms are often improved with surgery?
  1. Dizziness
  2. Hearing loss
  3. Both A and B
  4. None of the above

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