Surgical treatment of meningiomas located in the rolandic area: the role of navigated transcranial magnetic stimulation for preoperative planning, surgical strategy, and prediction of arachnoidal cleavage and motor outcome

Autor: Alfredo Conti, Antonino Germanò, Johannes Rein, Judith Rösler, Giuseppe Ricciardo, Salvatore Cardali, Peter Vajkoczy, Antonino Scibilia, Giovanni Raffa, Thomas Picht
Přispěvatelé: Raffa, Giovanni, Picht, Thoma, Scibilia, Antonino, Rösler, Judith, Rein, Johanne, Conti, Alfredo, Ricciardo, Giuseppe, Cardali, Salvatore Massimiliano, Vajkoczy, Peter, Germanò, Antonino
Rok vydání: 2020
Předmět:
medicine.medical_specialty
Surgical strategy
medicine.medical_treatment
CST = corticospinal tract
DTI = diffusion tensor imaging
DTI fiber tracking
DTI-FT = DTI fiber tracking
DWI = diffusion-weighted imaging
FDI = first dorsal interosseus
IONM = intraoperative neurophysiological mapping
MRC = Medical Research Council
MSO = maximum stimulator output
NPV = negative predictive value
PPV = positive predictive value
RMT = resting motor threshold
brain tumors
eloquent areas
meningiomas
nTMS = navigated transcranial magnetic stimulation
navigated transcranial magnetic stimulation
oncology
preoperative planning
meningioma
03 medical and health sciences
0302 clinical medicine
medicine
Surgical treatment
FDI = first dorsal interosseu
eloquent area
Preoperative planning
business.industry
General Medicine
nervous system diseases
body regions
Transcranial magnetic stimulation
medicine.anatomical_structure
030220 oncology & carcinogenesis
Corticospinal tract
Radiology
Motor Deficit
business
human activities
brain tumor
030217 neurology & neurosurgery
Diffusion MRI
Motor cortex
Zdroj: Journal of Neurosurgery. 133:107-118
ISSN: 1933-0693
0022-3085
DOI: 10.3171/2019.3.jns183411
Popis: OBJECTIVESurgical treatment of convexity meningiomas is usually considered a low-risk procedure. Nevertheless, the risk of postoperative motor deficits is higher (7.1%–24.7% of all cases) for lesions located in the rolandic region, especially when an arachnoidal cleavage plane with the motor pathway is not identifiable. The authors analyzed the possible role of navigated transcranial magnetic stimulation (nTMS) for planning resection of rolandic meningiomas and predicting the presence or lack of an intraoperative arachnoidal cleavage plane as well as the postoperative motor outcome.METHODSClinical data were retrospectively collected from surgical cases involving patients affected by convexity, parasagittal, or falx meningiomas involving the rolandic region, who received preoperative nTMS mapping of the motor cortex (M1) and nTMS-based diffusion tensor imaging (DTI) fiber tracking of the corticospinal tract before surgery at 2 different neurosurgical centers. Surgeons’ self-reported evaluation of the impact of nTMS-based mapping on surgical strategy was analyzed. Moreover, the nTMS mapping accuracy was evaluated in comparison with intraoperative neurophysiological mapping (IONM). Lastly, we assessed the role of nTMS as well as other pre- and intraoperative parameters for predicting the patients’ motor outcome and the presence or absence of an intraoperative arachnoidal cleavage plane.RESULTSForty-seven patients were included in this study. The nTMS-based planning was considered useful in 89.3% of cases, and a change of the surgical strategy was observed in 42.5% of cases. The agreement of nTMS-based planning and IONM-based strategy in 35 patients was 94.2%. A new permanent motor deficit occurred in 8.5% of cases (4 of 47). A higher resting motor threshold (RMT) and the lack of an intraoperative arachnoidal cleavage plane were the only independent predictors of a poor motor outcome (p = 0.04 and p = 0.02, respectively). Moreover, a higher RMT and perilesional edema also predicted the lack of an arachnoidal cleavage plane (p = 0.01 and p = 0.03, respectively). Preoperative motor status, T2 cleft sign, contrast-enhancement pattern, and tumor volume had no predictive value.CONCLUSIONSnTMS-based motor mapping is a useful tool for presurgical assessment of rolandic meningiomas, especially when a clear cleavage plane with M1 is not present. Moreover, the RMT can indicate the presence or absence of an intraoperative cleavage plane and predict the motor outcome, thereby helping to identify high-risk patients before surgery.
Databáze: OpenAIRE