Abstract
Infant gliomas have paradoxical clinical behavior compared to those in children and adults: low-grade tumors have a higher mortality rate, while high-grade tumors have a better outcome. However, we have little understanding of their biology and therefore cannot explain this behavior nor what constitutes optimal clinical management. Here we report a comprehensive genetic analysis of an international cohort of clinically annotated infant gliomas, revealing 3 clinical subgroups. Group 1 tumors arise in the cerebral hemispheres and harbor alterations in the receptor tyrosine kinases ALK, ROS1, NTRK and MET. These are typically single-events and confer an intermediate outcome. Groups 2 and 3 gliomas harbor RAS/MAPK pathway mutations and arise in the hemispheres and midline, respectively. Group 2 tumors have excellent long-term survival, while group 3 tumors progress rapidly and do not respond well to chemoradiation. We conclude that infant gliomas comprise 3 subgroups, justifying the need for specialized therapeutic strategies.
Publication types
-
Research Support, Non-U.S. Gov't
MeSH terms
-
Anaplastic Lymphoma Kinase / genetics
-
Anaplastic Lymphoma Kinase / metabolism
-
Brain Neoplasms / classification
-
Brain Neoplasms / genetics*
-
Brain Neoplasms / metabolism
-
DNA Methylation*
-
Epigenomics / methods*
-
Exome Sequencing / methods
-
Female
-
Gene Expression Regulation, Neoplastic*
-
Glioma / classification
-
Glioma / genetics*
-
Glioma / metabolism
-
Humans
-
Infant
-
Infant, Newborn
-
Male
-
Protein-Tyrosine Kinases / genetics
-
Protein-Tyrosine Kinases / metabolism
-
Proto-Oncogene Proteins / genetics
-
Proto-Oncogene Proteins / metabolism
-
Proto-Oncogene Proteins c-met / genetics
-
Proto-Oncogene Proteins c-met / metabolism
-
Receptor Protein-Tyrosine Kinases / genetics*
-
Receptor Protein-Tyrosine Kinases / metabolism
-
Receptor, trkA / genetics
-
Receptor, trkA / metabolism
-
Survival Analysis
Substances
-
Proto-Oncogene Proteins
-
Anaplastic Lymphoma Kinase
-
MET protein, human
-
Protein-Tyrosine Kinases
-
Proto-Oncogene Proteins c-met
-
ROS1 protein, human
-
Receptor Protein-Tyrosine Kinases
-
Receptor, trkA