Ependymomas, ZFTA‐fusion positive and ependymomas, YAP1‐fusion positive presented classical features of ependymoma with a nuclear accumulation of NFκB nuclear protein for the first group and eosinophilic granular bodies and strong immunoreactivity for EMA, without nuclear expression of NFκB for the second group. This evidence concerns the gene NFKB1 and ependymoma.