Flocculus Herniation into the Internal Acoustic Canal in Incomplete Partition Type I: A Case Report

Parlak Ş., Akgoz A., Arslan S., SENNAROĞLU L., KARLI OĞUZ H. K.

Journal of International Advanced Otology, vol.19, no.3, pp.266-268, 2023 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 19 Issue: 3
  • Publication Date: 2023
  • Doi Number: 10.5152/iao.2023.22797
  • Journal Name: Journal of International Advanced Otology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, EMBASE, MEDLINE, Directory of Open Access Journals
  • Page Numbers: pp.266-268
  • Keywords: cerebellar herniation, Cochlea, internal acoustic canal, sensorineural hearing loss
  • Hacettepe University Affiliated: Yes


In this study, we present the first case with cerebellar herniation into the internal acoustic canal in incomplete partition type I anomaly. Cerebellar herniation into the internal acoustic canal is very rare with only a few cases reported in the literature. Although it is a rare clinical situation, cerebellar herniation into the internal acoustic canal may be seen in patients with incomplete partition type I. We presented magnetic resonance imaging findings of a 3-year-old girl with a history of meningitis, middle ear effusion, and bilateral congenital sensorineural hearing loss. Magnetic resonance imaging showed bilateral incomplete partition type I malformation and an additional flocculus herniation into the right internal acoustic canal. In the presented case, predisposition to cerebrospinal fluid leak in incomplete partition type I anomaly may be the reason for cerebellar herniation into internal acoustic canal. Also, possible increased intracranial pressure due to meningitis may be a contributing factor.