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Table 2. Demographics and outcomes for recent case series of endoscopic transcribriform approach for olfactory groove
meningiomas
Arterial Vision Post-op vision
Female GTR Complications Recurrence
Ref. Year N encasement symptoms improvement
(%) (%) (%) (%) (%) (%) (%)
Khan et al. [42] 2014 6 100 NR 33 100 50 CSF leak: 33 0
[57]
Koutourousiou et al. 2014 50 64 NR 30 87 67 CSF leak: 30 2
PE/DVT: 20
Infection: 10
Vascular injury: 2
[56]
de Almeida et al. 2015 10 70 10 NR NR 70 CSF leak: 10 10
Meningitis: 10
MI: 10
[55]
Banu et al. 2016 6 100 0 17 100 50 CSF leak: 17 33
Infection: 33
Hematoma: 33
Stroke: 17
PE/DVT: 17
Hayhurst et al. [43] 2016 9 89 NR NR NR 89 CSF leak: 0 NR
Meningitis: 11
[62]
Liu et al. 2018 5 80 0 NR NR 100 CSF leak: 20 20
Hematoma: 20
[39]
Zoli et al. 2018 8 NR NR NR NR 63 CSF leak: 13 25
CSF: Cerebrospinal fluid; GTR: gross total resection; MI: myocardial infarction; N: number; NR: not reported; PE/DVT: pulmonary embolism/deep
venous thrombosis.

DECLARATIONS
Acknowledgments
The authors would like to thank Josh Emerson for his anatomy illustrations presented in this article.

Authors’ contributions
Made substantial contributions to conception and design of the study and performed data analysis and
interpretation: Avery MB, Barkhoudarian G, Kelly DF
Performed data acquisition, as well as provided administrative, technical, and material support: Avery MB,
Barkhoudarian G, Kelly DF

Availability of data and materials
Not applicable.

Financial support and sponsorship
None.

Conflicts of interest
Kelly DF receives royalties from Mizuho Inc.
Barkhoudarian G is a consultant for Vascular Technologies Inc.

Ethical approval and consent to participate
Not applicable.

Consent for publication
Not applicable.