TY - JOUR
T1 - Prognostic and predictive values of diffusion and perfusion MRI in paediatric intracranial ependymomas in a large national study
AU - Tensaouti, Fatima
AU - Ducassou, Anne
AU - Chaltiel, Leonor
AU - Sevely, Annick
AU - Bolle, Stephanie
AU - Muracciole, Xavier
AU - Coche-Dequant, Bernard
AU - Alapetite, Claire
AU - Supiot, Stephane
AU - Huchet, Aymeri
AU - Bernier, Valerie
AU - Claude, Line
AU - Bertozzi-Salamon, Anne Isabelle
AU - Liceaga, Samuel
AU - Lotterie, Jean Albert
AU - Péran, Patrice
AU - Payoux, Pierre
AU - Laprie, Anne
PY - 2016
Y1 - 2016
N2 - Objective: To assess the relative cerebral blood volume (rCBV) and apparent diffusion coefficient (ADC) derived, respectively, from perfusion and diffusion pre-operative MRI of intracranial ependymomas and their predictive and prognostic values. Methods: Pre-operative MRI and clinical data for intracranial ependymomas diagnosed between January 2000 and December 2013 were retrospectively retrieved from a web-based national database. MRI data included diffusion (62 patients) and perfusion (20 patients) MRI. Patient age, histopathological diagnosis, tumour location, ADC, relative ADC (rADC) and rCBV were considered as potential factors in a survival analysis. Survival rates were estimated using the Kaplan-Meier method. Univariate analyses were performed using the log-rank test to compare groups.We also performed a multivariate analysis, applying the Cox proportional hazards model. Results: ADC and rADC values within hypointense regions differed significantly between grades II and III (p50.01). The 75th percentile of ADC within hypointense regions and the 25th percentile of rCBV within nonenhancing lesions were prognostic of disease-free survival (p50.004, p50.05). A significant correlation was found between the 75th percentile of rCBV and the 25th percentile of rADC (p50.01) in enhancing regions of grade-III tumours. Conclusion: Pre-operative rADC and rCBV could be used as prognostic factors for clinical outcome and to predict histological grade in paediatric ependymomas.
AB - Objective: To assess the relative cerebral blood volume (rCBV) and apparent diffusion coefficient (ADC) derived, respectively, from perfusion and diffusion pre-operative MRI of intracranial ependymomas and their predictive and prognostic values. Methods: Pre-operative MRI and clinical data for intracranial ependymomas diagnosed between January 2000 and December 2013 were retrospectively retrieved from a web-based national database. MRI data included diffusion (62 patients) and perfusion (20 patients) MRI. Patient age, histopathological diagnosis, tumour location, ADC, relative ADC (rADC) and rCBV were considered as potential factors in a survival analysis. Survival rates were estimated using the Kaplan-Meier method. Univariate analyses were performed using the log-rank test to compare groups.We also performed a multivariate analysis, applying the Cox proportional hazards model. Results: ADC and rADC values within hypointense regions differed significantly between grades II and III (p50.01). The 75th percentile of ADC within hypointense regions and the 25th percentile of rCBV within nonenhancing lesions were prognostic of disease-free survival (p50.004, p50.05). A significant correlation was found between the 75th percentile of rCBV and the 25th percentile of rADC (p50.01) in enhancing regions of grade-III tumours. Conclusion: Pre-operative rADC and rCBV could be used as prognostic factors for clinical outcome and to predict histological grade in paediatric ependymomas.
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U2 - 10.1259/bjr.20160537
DO - 10.1259/bjr.20160537
M3 - Article
AN - SCOPUS:84989823334
VL - 89
JO - British Journal of Radiology
JF - British Journal of Radiology
SN - 0007-1285
IS - 1066
M1 - 20160537
ER -