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- W3112214514 abstract "Abstract INTRODUCTION Glioblastoma in infancy and early childhood is characterized by a more favorable outcome compared to older children, a stable genome, and the occurrence of tyrosine kinase gene fusions that may represent therapeutic targets. METHODS 50 glioblastomas (GBM) with supratentorial location occurring in children younger than four years were retrieved from the archives of the Brain Tumor Reference Center, Institute of Neuropathology, University of Bonn. DNA and RNA were extracted from FFPE tumor samples. Gene fusions were identified by FISH using break-apart probes for ALK, NTRK1, -2, -3, ROS1 and MET, Molecular Inversion Probe (MIP) methodology, and targeted RNA sequencing. RESULTS 37 supratentorial GBM occurred in the first year of life, 13 GBM between one and four years. 18 cases showed fusions of ALK to different fusion partners; all occurred in the first year of life (18/37 cases, 48.6%). Fusions of ROS1 were found in 5, MET in 3, NTRK1, -2, -3 in 10 cases. 12 cases showed no and two novel fusions. The different methods led to comparable results; targeted RNA sequencing was not successful in a fraction of cases. Break-apart FISH led to reliable results on the next day, MIP technology represented the most sensitive method for analysis of FFPE samples. CONCLUSIONS Gene fusions involving the tyrosine kinase genes ALK, MET, ROS1 and NTRK1, -2, -3 occurred in 72% of glioblastomas of children younger than four years; the most frequent were ALK fusions occurring in infant GBM. DNA based MIP technology represented the most robust and sensitive assay." @default.
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- W3112214514 date "2020-12-01" @default.
- W3112214514 modified "2023-09-27" @default.
- W3112214514 title "HGG-34. DETECTION OF ONCOGENIC FUSION EVENTS IN SUPRATENTORIAL GLIOBLASTOMAS OF YOUNG CHILDREN" @default.
- W3112214514 doi "https://doi.org/10.1093/neuonc/noaa222.315" @default.
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