Olfactory groove meningiomas: postoperative preservation of olfactory and visual functions, evaluation of risk factors
EANS Academy. Stastna D. 09/25/19; 275863; EP04005
Daniela Stastna
Daniela Stastna

Access to this content is reserved for EANS members and attendees of this event. Click here to become an EANS member and gain your access to the full content of the EANS Academy


Abstract
Discussion Forum (0)
Rate & Comment (0)
Background: Olfactory groove meningiomas (OGM) put patients' olfaction and vision at risk, often insidiously. We aimed was determine the frequency and features associated with pre- and postoperative visual and olfactory.
Methods: We retrospectively analysed records of 76 patients who underwent surgical resection of OGM between 2002-2018, focusing on preservation of olfaction and vision in relation to demographic, clinico-radiological and surgical variables. Chi-square, Fisher`s exact, Anova tests, Kaplan-Meier study were used when appropriate.
Results: 90% of the OGM had maximal diameter >4cm; 26% with PS extension.
Approaches: bifrontal transbasal (59%), interhemispheric(22%), unilateral fronto-temporal(16%) or endoscopic(3%) approaches. Simpson 1 or 2 resection was achieved in 69 patients (91%). Five-year tumour control rates were: 88%; 82% and 75% for bifrontal transbasal, interhemispheric and fronto-temporal approaches, respectively.
Thirty patients (42%) affirmed preoperative olfaction. Of those, 53% retained olfaction post-operatively.
Preoperative anosmia was associated with edema, calcification and seizures (p=0.0463, 0.012, 0.007, respectively). Olfaction preservation by approach: fronto-temporal (67% of patients): bifrontal (56%); interhemispheric approach (29%). New postoperative anosmia was associated with OGM extension towards midpupillary line (p=0.013).
Preoperatively, 24% of patients had unilateral and 12% bilateral visual deficit. Postoperatively, vision improved in 38% patients with unilateral visual deficit, but only in 11% of patients with bilateral deficit. 65% of patients had intact vision and most of them (98%) preserved it after the surgery. Preoperative visual deficit correlated with tumor volume (p=0.004) and calcification(p=0.047). Postoperative visual deterioration was only associated with presurgical visual deficit (p=0.0001).
Conclusions: Post-operative olfactory preservation was related lateral extension and unilateral approach. Post-operative visual function was closely related to pre-operative visual status.
Background: Olfactory groove meningiomas (OGM) put patients' olfaction and vision at risk, often insidiously. We aimed was determine the frequency and features associated with pre- and postoperative visual and olfactory.
Methods: We retrospectively analysed records of 76 patients who underwent surgical resection of OGM between 2002-2018, focusing on preservation of olfaction and vision in relation to demographic, clinico-radiological and surgical variables. Chi-square, Fisher`s exact, Anova tests, Kaplan-Meier study were used when appropriate.
Results: 90% of the OGM had maximal diameter >4cm; 26% with PS extension.
Approaches: bifrontal transbasal (59%), interhemispheric(22%), unilateral fronto-temporal(16%) or endoscopic(3%) approaches. Simpson 1 or 2 resection was achieved in 69 patients (91%). Five-year tumour control rates were: 88%; 82% and 75% for bifrontal transbasal, interhemispheric and fronto-temporal approaches, respectively.
Thirty patients (42%) affirmed preoperative olfaction. Of those, 53% retained olfaction post-operatively.
Preoperative anosmia was associated with edema, calcification and seizures (p=0.0463, 0.012, 0.007, respectively). Olfaction preservation by approach: fronto-temporal (67% of patients): bifrontal (56%); interhemispheric approach (29%). New postoperative anosmia was associated with OGM extension towards midpupillary line (p=0.013).
Preoperatively, 24% of patients had unilateral and 12% bilateral visual deficit. Postoperatively, vision improved in 38% patients with unilateral visual deficit, but only in 11% of patients with bilateral deficit. 65% of patients had intact vision and most of them (98%) preserved it after the surgery. Preoperative visual deficit correlated with tumor volume (p=0.004) and calcification(p=0.047). Postoperative visual deterioration was only associated with presurgical visual deficit (p=0.0001).
Conclusions: Post-operative olfactory preservation was related lateral extension and unilateral approach. Post-operative visual function was closely related to pre-operative visual status.
Code of conduct/disclaimer available in General Terms & Conditions

By clicking “Accept Terms & all Cookies” or by continuing to browse, you agree to the storing of third-party cookies on your device to enhance your user experience and agree to the user terms and conditions of this learning management system (LMS).

Cookie Settings
Accept Terms & all Cookies