HLA class I ligands from 4 CTAs were identified in more than 10% of the EPN samples, comprising U3 small nucleolar ribonucleoprotein IMP3 (IMP3) represented by 3 different peptides in 8 tumor samples, the ankyrin repeat domain-containing protein 45 (ANKRD45), of which the same peptide was found in 6 different samples, and the armadillo repeat-containing protein 3 (ARMC3) presented by 2 different peptides in 3 samples. Here, IMP3 is linked to neoplasm.