Arachnoid Cyst

Temporal Bone Image Library

  • Title: Arachnoid cyst of IAC, L-191-3
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 105
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis
    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, L-191-3
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-5
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-191
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-191
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-5
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-6
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-6
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-7
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-7
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-4
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-4
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-1
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-1
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-3
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-3
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: Arachnoid cyst of IAC, R-221-3
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst
  • TB Case Number: 1005
  • Comments: 92 year old female with occult arachnoid cyst of the internal auditory canal (IAC)
  • Gender: Female
  • Age(yrs.): 92
  • otologic_dx:

    Clinical:
    1. Mixed hearing loss, AU, predominantly sensorineural, due to presbycusis

    Otopathologic Diagnoses:
    1. Chronic otitis media without cholesteatoma, inactive and healed, bilateral
    2. Retraction pocket of tympanic membrane, bilateral, affecting pa

  • Title: R-210 Arachnoid Cyst
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst, Other Otologic Disorders
  • TB Case Number: 392
  • Gender: Female
  • Age(yrs.): 58
  • otologic_dx:

    1. Temporal bone, normal
    2. Membranous labyrinth, excellent preservation and preparation

  • Title: L-211 Arachnoid Cyst
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst, Other Otologic Disorders
  • TB Case Number: 424
  • Gender: Male
  • Age(yrs.): 38
  • otologic_dx:

    1. Leukemia
    2. otitis media, suppurative, chronic, inactive, left
    3. Tympanic membrane, perforation, central, large, left
    4. Petrous apex, leukemic infiltrate replacing bone marrow, left
    5. Middle ear, leukemic infiltrate throughout the mucosa and fibrous tissue, left
    6. Mastoid, sclerosis, post inflammatory, left
    7. Otosclerosis, stapes fixation, (clinical), left

  • Title: L-91 Acrachnoid Cyst
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst, Other Otologic Disorders
  • TB Case Number: 535
  • Gender: Female
  • Age(yrs.): 74
  • otologic_dx:

    1. Meniere’s disease, severe, bilateral
    2. Cupulolithiasis, lateral canal, right
    3. Vestibular schwannoma, intracanalicular and protruding into the cerebellopontine angle, right
    4. Arachnoid cyst with compression of the facial, cochlear and vestibular nerve trunks, left
    5. Surgical bone removal, round window niche for ultrasound therapy, left (no evidence of inner ear reaction)

  • Title: L-199 Arachnoid Cyst
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst, Other Otologic Disorders
  • TB Case Number: 535
  • Gender: Female
  • Age(yrs.): 74
  • otologic_dx:

    1. Meniere’s disease, severe, bilateral
    2. Cupulolithiasis, lateral canal, right
    3. Vestibular schwannoma, intracanalicular and protruding into the cerebellopontine angle, right
    4. Arachnoid cyst with compression of the facial, cochlear and vestibular nerve trunks, left
    5. Surgical bone removal, round window niche for ultrasound therapy, left (no evidence of inner ear reaction)

  • Title: L-199 Arachnoid Cyst
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst, Other Otologic Disorders
  • TB Case Number: 535
  • Gender: Female
  • Age(yrs.): 74
  • otologic_dx:

    1. Meniere’s disease, severe, bilateral
    2. Cupulolithiasis, lateral canal, right
    3. Vestibular schwannoma, intracanalicular and protruding into the cerebellopontine angle, right
    4. Arachnoid cyst with compression of the facial, cochlear and vestibular nerve trunks, left
    5. Surgical bone removal, round window niche for ultrasound therapy, left (no evidence of inner ear reaction)

  • Title: L-199 Arachnoid Cyst
  • Chapter: Disorders of Unknown Cause
  • Chapter section: Arachnoid Cyst, Other Otologic Disorders
  • TB Case Number: 535
  • Gender: Female
  • Age(yrs.): 74
  • otologic_dx:

    1. Meniere’s disease, severe, bilateral
    2. Cupulolithiasis, lateral canal, right
    3. Vestibular schwannoma, intracanalicular and protruding into the cerebellopontine angle, right
    4. Arachnoid cyst with compression of the facial, cochlear and vestibular nerve trunks, left
    5. Surgical bone removal, round window niche for ultrasound therapy, left (no evidence of inner ear reaction)