Apparent diffusion coefficients in evaluation of pediatric brain tumors
Lojana Tuntiyatorn1, Bordin Nantawas, Nongnuch Sirachainan
1Division of Neuroradiology, Department of Radiology, Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand. lojana.tun@mahidol.ac.th
Summary
Apparent diffusion coefficients (ADCs) measured using MRI can help differentiate pediatric low-grade from high-grade brain tumors. Higher ADC values indicate lower-grade tumors, aiding in surgical planning.
Area of Science:
- Neuroimaging
- Pediatric Oncology
- Radiology
Background:
- Magnetic Resonance Imaging (MRI) offers high sensitivity for brain tumor detection but struggles with accurate grading and histology.
- Diffusion-weighted imaging (DWI) and apparent diffusion coefficients (ADCs) provide insights into tumor cellularity, which correlates with tumor grade.
Purpose of the Study:
- To evaluate the efficacy of ADCs in distinguishing between low-grade and high-grade pediatric brain tumors.
- To assess the correlation between ADC values and tumor grade in pediatric brain tumors.
Main Methods:
- Retrospective review of preoperative MRI, DWI, and ADC images from pediatric patients with confirmed brain tumors.
- Manual placement of regions of interest in the center and periphery of solid tumor components.
- Calculation of ADC values at specific "b" values (0 and 1000 sec/mm²).
Main Results:
- ADC values were analyzed in 15 pediatric patients (7 low-grade, 8 high-grade).
- Significantly higher ADC values were observed in low-grade tumors compared to high-grade tumors.
- Statistical significance (p-values: 0.037, 0.009, 0.021) was found for central, peripheral, and average ADC measurements.
Conclusions:
- MRI utilizing ADCs shows promise for preoperative assessment of pediatric brain tumors.
- ADC measurements can aid in predicting tumor grade and optimizing surgical planning for pediatric brain tumors.
