_:vb50941809 "url:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6851394/"^^ . _:vb50941809 . _:vb50941809 . _:vb50941809 . _:vb50941809 . _:vb50941809 "A spinal cord ependymoma that is characterized by MYCN amplification."^^ .