Abstract
Background
Medulloblastomas are the most common central nervous system tumors in childhood. Treatment and prognosis strongly depend on histology and transcriptomic profiling. However, the proliferative potential also has prognostical value. Our study aimed to investigate correlations between histogram profiling of diffusion-weighted images and further microarchitectural features.
Material and methods
Seven patients (age median 14.6 years, minimum 2 years, maximum 20 years; 5 male, 2 female) were included in this retrospective study. Using a Matlab-based analysis tool, histogram analysis of whole apparent diffusion coefficient (ADC) volumes was performed.
Results
ADC entropy revealed a strong inverse correlation with the expression of the proliferation marker Ki67 (r = − 0.962, p = 0.009) and with total nuclear area (r = − 0.888, p = 0.044). Furthermore, ADC percentiles, most of all ADCp90, showed significant correlations with Ki67 expression (r = 0.902, p = 0.036).
Discussion and conclusion
Diffusion histogram profiling of medulloblastomas provides valuable in vivo information which potentially can be used for risk stratification and prognostication. First of all, entropy revealed to be the most promising imaging biomarker. However, further studies are warranted.
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Schob, S., Beeskow, A., Dieckow, J. et al. Diffusion profiling of tumor volumes using a histogram approach can predict proliferation and further microarchitectural features in medulloblastoma. Childs Nerv Syst 34, 1651–1656 (2018). https://doi.org/10.1007/s00381-018-3846-2
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DOI: https://doi.org/10.1007/s00381-018-3846-2