Whole genome sequencing (WGS) analysis of a tumor expressing the CTNND1-ARHGAP26 fusion revealed that g.chr11:57,578,103 (CTNND1 intron 15) was aberrantly fused to g.chr5:142,358,707 (ARHGAP26 intron 11; Supplementary Table 9) at the genomic DNA level. The gene discussed is ARHGAP26; the disease is neoplasm.