J Neurol Surg B Skull Base 2022; 83(S 01): S1-S270
DOI: 10.1055/s-0042-1743889
Presentation Abstracts
Poster Presentations

Microscope-Assisted Supraorbital Keyhole Craniotomy for the Resection of Large Olfactory Groove Meningiomas

Lina Marenco Hillembrand
1   Mayo Clinic, Rochester, Minnesota, United States
,
Michael A. Bamimore
1   Mayo Clinic, Rochester, Minnesota, United States
,
Paola Suarez Meade
1   Mayo Clinic, Rochester, Minnesota, United States
,
Krishnan Ravindran
1   Mayo Clinic, Rochester, Minnesota, United States
,
Kaisorn L. Chaichana
1   Mayo Clinic, Rochester, Minnesota, United States
› Author Affiliations
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    Objective: Olfactory groove meningiomas (OGM) represent 8 to 13% of all intracranial meningiomas. These tumors are generally approached through open or endoscopic endonasal approaches.

    To determine the postoperative outcomes of microscope-assisted supraorbital (eyebrow) keyhole approach (SKA) for the resection of large (>4 cm) OGM.

    Methods: All patients who underwent microscope-assisted SKA by the senior author from January 2018 to September 2021 were prospectively identified and patient information and outcomes were collected.

    Results: Four consecutive patients harboring WHO grade I OGM underwent resection through a supraorbital keyhole craniotomy with microscopic visualization. The mean age ± standard deviation (SD) was 65 years old ± 5.7 years. Symptoms at presentation included seizures (n = 1), anosmia or hyposmia (n = 2), visual changes (n = 1), aphasia (n = 1), abnormal gait (n = 1), and headaches (n = 1). The mean preoperative KPS was 75 (range: 30–100). The average preoperative tumor diameter was 4.71 cm (range: 4–7 cm). The average preoperative tumor volume ± SD was 24.8± 19.78 cm3 and the mean preoperative FLAIR volume was 50.9 ± 71.92 cm3. Gross total resection (GTR) was achieved in all cases. The mean length of stay was 4 ± 2.8 days, all patients were discharged home. The average postoperative KPS score was 97.5, without any postoperative complications or new neurological deficits. The mean length of follow-up was 66 days (range: 14–115 days). In two patients FLAIR volume disappeared on follow-up, the average time for FLAIR disappearance was of 107.5 ± 10.6 days. No patients had tumor recurrence upon follow-up.

    Conclusion: Microscope-Assisted Supraorbital Keyhole craniotomy represents a safe and effective technique with high rates of GTR and minimal postoperative morbidity for large OGM.


     

    No conflict of interest has been declared by the author(s).

    Publication History

    Article published online:
    15 February 2022

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