ERBB2 and cholangiocarcinoma: The qRT-PCR experiments on 12 cystic CCs and 12 fusiform CCs demonstrated that the mRNA expression of ERBB2 was significantly lower in cystic CC samples than that in fusiform CC samples (t = 3.425, p = 0.004), whereas the mRNA expression of WNT11 was significantly higher in cystic CC samples than that in fusiform CC samples (t = −3.917, p = 0.002) (Figure 6D).