In the tumor harboring ZNF207-HER2, the increased expression of HER2 mRNA was observed only after the fusion site, whereas the increased expression of ZNF207 mRNA was detected only before the fusion site, further confirming that the amplification of the ZNF207-HER2 fusion was a homogeneous event in the sample (Figure 3A). Here, ERBB2 is linked to neoplasm.