Relationships between regional radiation doses and cognitive decline in children treated with cranio-spinal irradiation for posterior fossa tumors

Elodie Doger de Speville, Charlotte Robert, Martin Perez-Guevara, Antoine Grigis, Stephanie Bolle, Clemence Pinaud, Christelle Dufour, Anne Beaudré, Virginie Kieffer, Audrey Longaud, Jacques Grill, Dominique Valteau-Couanet, Eric Deutsch, Dimitri Lefkopoulos, Catherine Chiron, Lucie Hertz-Pannier, Marion Noulhiane

    Résultats de recherche: Contribution à un journalArticleRevue par des pairs

    22 Citations (Scopus)

    Résumé

    Pediatric posterior fossa tumor (PFT) survivors who have been treated with cranial radiation therapy often suffer from cognitive impairments that might relate to IQ decline. Radiotherapy (RT) distinctly affects brain regions involved in different cognitive functions. However, the relative contribution of regional irradiation to the different cognitive impairments still remains unclear. We investigated the relationships between the changes in different cognitive scores and radiation dose distribution in 30 children treated for a PFT. Our exploratory analysis was based on a principal component analysis (PCA) and an ordinary least square regression approach. The use of a PCA was an innovative way to cluster correlated irradiated regions due to similar radiation therapy protocols across patients. Our results suggest an association between working memory decline and a high dose (equivalent uniform dose, EUD) delivered to the orbitofrontal regions, whereas the decline of processing speed seemed more related to EUD in the temporal lobes and posterior fossa. To identify regional effects of RT on cognitive functions may help to propose a rehabilitation program adapted to the risk of cognitive impairment.

    langue originaleAnglais
    Numéro d'article166
    journalFrontiers in Oncology
    Volume7
    Numéro de publicationAUG
    Les DOIs
    étatPublié - 18 août 2017

    Contient cette citation