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Towards a tractography-based risk stratification model for language area associated gliomas

  • Objectives: Injury to major white matter pathways during language-area associated glioma surgery often leads to permanent loss of neurological function. The aim was to establish standardized tractography of language pathways as a predictor of language outcome in clinical neurosurgery. Methods: We prospectively analyzed 50 surgical cases of patients with left perisylvian, diffuse gliomas. Standardized preoperative Diffusion-Tensor-Imaging (DTI)-based tractography of the 5 main language tracts (Arcuate Fasciculus [AF], Frontal Aslant Tract [FAT], Inferior Fronto-Occipital Fasciculus [IFOF], Inferior Longitudinal Fasciculus [ILF], Uncinate Fasciculus [UF]) and spatial analysis of tumor and tracts was performed. Postoperative imaging and the resulting resection map were analyzed for potential surgical injury of tracts. The language status was assessed preoperatively, postoperatively and after 3 months using the Aachen Aphasia Test and Berlin Aphasia Score. Correlation analyses, two-step cluster analysis and binary logistic regression were used to analyze associations of tractography results with language outcome after surgery. Results: In 14 out of 50 patients (28%), new aphasic symptoms were detected 3 months after surgery. The preoperative infiltration of the AF was associated with functional worsening (cc = 0.314; p = 0.019). Cluster analysis of tract injury profiles revealed two areas particularly related to aphasia: the temporo-parieto-occipital junction (TPO; temporo-parietal AF, middle IFOF, middle ILF) and the temporal stem/peri-insular white matter (middle IFOF, anterior ILF, temporal UF, temporal AF). Injury to these areas (TPO: OR: 23.04; CI: 4.11 – 129.06; temporal stem: OR: 21.96; CI: 2.93 – 164.41) was associated with a higher-risk of persisting aphasia. Conclusions: Tractography of language pathways can help to determine the individual aphasia risk profile presurgically. The TPO and temporal stem/peri-insular white matter were confirmed as functional nodes particularly sensitive to surgical injuries.

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Author:Mehmet Salih Tuncer, Luca Francesco Salvati, Ulrike Grittner, Juliane Hardt, Ralph Schilling, Ina Bährend, Luca Leandro Silva, Lucius S. Fekonja, Katharina Faust, Peter Vajkoczy, Tizian Rosenstock, Thomas Picht
DOI original:https://doi.org/10.1016/j.nicl.2020.102541
Parent Title (English):NeuroImage: Clinical
Document Type:Article
Year of Completion:2021
Publishing Institution:Hochschule Hannover
Release Date:2021/01/12
Tag:Fasciculus arcuatus
Aphasia; Arcuate fasciculus; Brain tumor; DTI; Glioma; Language pathways; Risk stratification; Tractography
GND Keyword:Gliom; Diffusionsgewichtete Magnetresonanztomografie; Aphasie; Hirntumor
Link to catalogue:175748325X
Institutes:Fakultät III - Medien, Information und Design
DDC classes:610 Medizin, Gesundheit
Licence (German):License LogoCreative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International