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Dehiscence or thinning of bone overlying the superior semicircular canal in idiopathic intracranial hypertension

  • Otology
  • Published:
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Abstract

Study design

Retrospective cohort.

Objectives

The objective of the study is to evaluate a relationship between idiopathic intracranial hypertension (IIH) and superior semicircular canal dehiscence (SSCD) of bone overlying the superior semicircular canal (SSC).

Materials and methods

A total of 57 (114 ears) individuals, 20 of whom were controls and 37 of whom were IIH, were included in the study. Individuals were evaluated with 0.8 mm slice thickness computed tomography (CT) images for SSC bony roof thickness and SSCD. Thickness of the bony roof over the SSC was graded from Grade 1 to Grade 4. Grade 3 was defined as pre-dehiscence and Grade 4 as dehiscence.

Results

Bony roof thickness was 1.25 mm in the control group and 0.76 mm in the IIH group. When bony roof thickness was compared between the groups, it was found to be significantly thinner in the IIH group (p = 0.012). In the IIH group, while dehiscence was detected in 25 of 74 ears, no dehiscence was detected in 49 ears. In the control group, while dehiscence was detected in 5 ears, no dehiscence was detected in 35 ears. The difference is statistically significant (p = 0.015). The correlation between bony roof thickness and cerebrospinal fluid (CSF) pressure in the IIH group was not statistically significant (p = 0.343; rho = 0.110). The correlation between bony roof thickness and age in the IIH group was not statistically significant (p = 0.082; rho =  − 0.164).

Conclusion

Increased CSF pressure in patients with IIH may cause chronic, progressive, and irreversible damage to the bone of the SSC and, according to our study, the rate of SSCD was found to be high in IIH patients.

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Funding

The authors have no other funding financial relationships.

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Authors and Affiliations

  1. Department of Otorhinolaryngology-Head and Neck Surgery, University Health of Sciences Prof. Dr. Cemil Taşçioğlu Training and Research Hospital Hospital, Darulaceze Cad. No: 25 Okmeydani, Sisli/Istanbul, Turkey

    Güler Berkiten, Belgin Tutar, Hasan Sami Bircan, Hüseyin Sarı, Yavuz Atar & Yavuz Uyar

  2. Department of Radiology, Prof. Dr. Cemil Taşçioğlu Training and Research Hospital Hospital, Darulaceze Cad. No: 25 Okmeydani, Sisli/Istanbul, Turkey

    Defne Gürbüz & Melis Koşar Tunç

  3. Department of Neurology, Prof. Dr. Cemil Taşçioğlu Training and Research Hospital Hospital, Darulaceze Cad. No: 25 Okmeydani, Sisli/Istanbul, Turkey

    Onur Akan

  4. Department of Otorhinolaryngology-Head and Neck Surgery, Bulanik State Hospital, Muş, Istanbul, Turkey

    Semih Karaketir

  5. Faculty of Medicine, Istanbul University Cerrahpasa, Istanbul, Turkey

    Ertan Berkiten

Authors
  1. Güler Berkiten
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  2. Defne Gürbüz
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  3. Onur Akan
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  8. Ertan Berkiten
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  9. Hüseyin Sarı
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Contributions

GB: conception and design, writing the article; DG: data collection; MK: data collection; OA: analysis and interpretation; BT: analysis and interpretation; HSB: writing the article; HS: analysis and interpretation; EB: writing the article; SK: statistical analysis; YA: statistical analysis; YU: conception and design.

Corresponding author

Correspondence to Güler Berkiten.

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Conflict of interest

The authors declare that they have no conflict of interest.

Ethical approval

The study was approved by local ethic committee (Okmeydanı Training and Research Hospital).

Informed consent

The study design was prospective study and this research was performed with human participants. All patients were signed written informed consent.

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Berkiten, G., Gürbüz, D., Akan, O. et al. Dehiscence or thinning of bone overlying the superior semicircular canal in idiopathic intracranial hypertension. Eur Arch Otorhinolaryngol 279, 2899–2904 (2022). https://doi.org/10.1007/s00405-021-07020-z

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  • DOI: https://doi.org/10.1007/s00405-021-07020-z

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