Unruptured translabyrinthine meningocele without CSF otorrhea

Internal auditory canal meningocele‐perilabyrinthine/translabyrinthine fistula: Case report and imaging

“…There has been only one other case reported of a translabyrinthine fistula that was unruptured . This previously reported patient's temporal bone meningocele was covered by the arachnoid membrane when evaluated surgically …”

“…The patient is older at presentation (15 years old) than most patients with this abnormality who usually present in the first 5 to 10 years of life . His presentation is also not classic; sensorineural hearing loss is his only symptom, but most patients present with: 1) CSF rhinorrhea (tympanic membrane [TM] intact, with fluid being transmitted through the eustachian tube, 2) CSF otorrhea (TM is perforated either spontaneously or during myringotomy), 3) recurrent meningitis . The lack of CSF otorrhea or rhinorrhea in these translabyrinthine fistulas suggest the temporal bone meningocele is unruptured.…”

“…6 This previously reported patient's temporal bone meningocele was covered by the arachnoid membrane when evaluated surgically. 5 Although the case subject and his family dismissed genetic testing, it is important to consider genetic contributions in such cases. Nance et al first described a congenital X-linked mixed hearing loss with fixed stapes footplate and perilymph gushing when approached with stapedectomy.…”

Meningocele of the Internal Auditory Canal Requiring Facial-Nerve Decompression

“…The final pathology report findings of benign glial tissue supported the diagnosis of an IAC meningocele. An unruptured meningocele would also correlate with the lack of a CSF leak prior to intervention when compared to other clinical entities such as a translabyrinthine fistula [4].…”

Transmastoid Cartilage Graft-Meningocele Temporal: Surgical Approach

“…Kong et al, [5] described a case of Trans labyrinthine meningocele with a vestibulocochlear malformation presenting as deafness and a middle ear mass, in which the treatment of meningocele was coverage with perichondrium and cartilage composite graft obtained from conchal cartilage to protect it from later trauma and to prevent CSF leakage [5].…”