RELA and ependymoma: Further DNA methylation analysis of ELTMDs, especially those with C11orf95‐RELA, is necessary to clarify the epigenetic relationships between ELTMDs with C11orf95‐RELA and ependymomas with C11orf95‐RELA, and between ELTMDs with C11orf95‐RELA and ELTMDs with C11orf95‐NCOA1/2.