Related Experiment Video
Updated: Jun 8, 2026
Role of Diffusion MRI Tractography in Endoscopic Endonasal Skull Base Surgery
Published on: July 5, 2021
Role of diffusion-weighted MR imaging in assessing malignant versus benign skull-base lesions
A Abdel Razek1, A Mossad, M Ghonim
1Department of Diagnostic Radiology, Mansoura Faculty of Medicine, Mansoura, Egypt. arazek@mans.eun.eg
Purpose:
This study was done to assess the role of diffusion-weighted magnetic resonance (MR) imaging in assessing malignant versus benign skull lesions.
Materials And Methods:
A retrospective analysis was undertaken of 45 patients (26 male, 19 female; age range 14-68 years, mean age 39 years) with skull-base lesions. Diffusion-weighted MR images were acquired with a b-factor of 500 and 1,000 s/mm(2) using single-shot echoplanar imaging. Apparent diffusion coefficient (ADC) maps were reconstructed, and the ADC value of the lesion was calculated.
Results:
The mean ADC value of malignant tumours was (1.002 ± 0.21) × 10(-3) mm(2)/s and that of benign tumours was (1.63 ± 0.29) × 10(-3) mm(2)/s. There was a statistically significant difference (p=0.001) in the ADC value of malignant skull-base tumours versus benign lesions. Selection of (1.3) × 10(-3)mm(2)/s as a threshold value of ADC for differentiating benign from malignant tumours yielded the best result, with an accuracy of 94%, sensitivity of 94%, specificity of 93%, positive predictive value of 93%, negative predictive value of 94% and area under the curve of 0.932.
Conclusions:
We conclude that diffusion-weighted MR imaging is a promising, noninvasive approach that can be used to characterise skull-base lesions in that it can help differentiate malignant tumours from benign lesions and evaluate the pathological grading of malignant tumours.
Insights
Diffusion-weighted MRI effectively distinguishes malignant from benign skull lesions. This noninvasive technique shows promise for characterizing skull-base tumors and assessing their pathological grade.
Area of Science:
- Radiology
- Oncology
- Medical Imaging
Background:
- Skull-base lesions present diagnostic challenges.
- Differentiating malignant from benign tumors is crucial for treatment planning.
Purpose of the Study:
- To evaluate the efficacy of diffusion-weighted magnetic resonance (MR) imaging in differentiating malignant from benign skull lesions.
- To assess the role of apparent diffusion coefficient (ADC) values in lesion characterization.
Main Methods:
- Retrospective analysis of 45 patients with skull-base lesions.
- Diffusion-weighted MR imaging with b-factors of 500 and 1,000 s/mm(2) was performed.
- Apparent diffusion coefficient (ADC) maps were generated to calculate lesion ADC values.
Main Results:
- Mean ADC value for malignant tumors was 1.002 × 10(-3) mm(2)/s, and for benign tumors was 1.63 × 10(-3) mm(2)/s.
- A statistically significant difference (p=0.001) was observed in ADC values between malignant and benign lesions.
- An ADC threshold of 1.3 × 10(-3) mm(2)/s achieved 94% accuracy, 94% sensitivity, and 93% specificity.
Conclusions:
- Diffusion-weighted MR imaging is a valuable noninvasive tool for characterizing skull-base lesions.
- This technique aids in differentiating malignant from benign tumors.
- It shows potential for evaluating the pathological grading of malignant skull tumors.
Related Concept Videos
01:24Magnetic Resonance Imaging
01:17Assessment of Diffusion and Perfusion
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...