Smell preservation following unilateral endoscopic transnasal approach to resection of olfactory groove meningioma: a multi-institutional experience

Carolyn A. Orgain*, Edward C. Kuan, Raquel Alvarado, Nithin D. Adappa, Benjamin P. Jonker, John Y. K. Lee, James N. Palmer, Mark Winder, Richard J. Harvey

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Introduction Olfactory groove meningiomas (OGMs) are often associated with loss of smell following resection. Loss of smell has a measurable impact on quality of life. Smell preservation has been previously described in open approaches for early stage or unilateral OGMs. Evidence of smell preservation in endoscopic approaches is lacking. Design A multi-institutional retrospective review was performed on consecutive patients who underwent unilateral endoscopic endonasal resection of OGM. A gross total resection was achieved with preservation of the contralateral olfactory cleft and bulb. Olfactory function was assessed with a six-point olfactory symptom score and the Sniffin' Sticks 12-item smell identification test (SS-12). Contralateral olfactory bulb volume was measured on postoperative magnetic resonance imaging. Results Four patients (age 42.0 ± 7.5, 75% female) were assessed. Olfactory function was assessed at 21.8 ± 5.6 months following surgery. All patients reported some degree of smell preservation (75% described a slight/mild impairment in smell or better). Olfactory identification was preserved with an SS-12 score of 9 ± 1.4 (anosmia defined as ≤6). The olfactory bulb volume was calculated to be 47.4 ± 15.9 mm3 (normal >40 mm3). Conclusion Smell preservation is possible following unilateral endoscopic endonasal resection of carefully selected OGM.

Original languageEnglish
Pages (from-to)263-267
Number of pages5
JournalJournal of Neurological Surgery, Part B: Skull Base
Issue number3
Publication statusPublished - Jun 2020


  • endoscopic
  • skull base
  • surgery
  • olfactory groove meningioma
  • smell
  • smell preservation

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