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Intraoperative sonography in low-grade gliomas
M K Hatfield1, J M Rubin, S S Gebarski
1Department of Radiology, University of Chicago, Illinois.
Summary
Intraoperative sonography can identify low-grade brain gliomas. Areas of increased echogenicity without shadowing on ultrasound correlate with CT-detected enhancement, aiding in diagnosis.
Area of Science:
- Neuroimaging
- Neurosurgery
- Oncology
Background:
- Low-grade brain gliomas require accurate diagnostic methods.
- Distinguishing tumor characteristics preoperatively is crucial for surgical planning.
Purpose of the Study:
- To evaluate the correlation between intraoperative sonography findings and preoperative computed tomography (CT) enhancement in low-grade brain gliomas.
- To determine if specific sonographic echogenicity patterns predict CT-identified tumor enhancement.
Main Methods:
- Retrospective analysis of 15 patients with low-grade brain gliomas.
- Comparison of intraoperative sonography data with preoperative head CT scans.
- Assessment of glioma echogenicity relative to adjacent sulcal echogenicity.
Main Results:
- Seven of eight gliomas with pathologic CT enhancement exhibited increased echogenicity without shadowing on sonography.
- Areas of increased echogenicity generally corresponded topographically with CT enhancement.
- Six of seven gliomas without pathologic CT enhancement showed echogenicity less than sulcal echogenicity.
Conclusions:
- Increased echogenicity without shadowing on intraoperative sonography is a reliable indicator of CT-detected enhancement in low-grade gliomas.
- These sonographic findings differ from those observed in high-grade gliomas, suggesting distinct imaging characteristics.