IL33 and breast angiosarcoma: In the subgroups of BA patients, IHC staining shows IL-33 expression level is relatively higher in p-BA livers compared to g-BA livers (4.1 ± 0.8 vs. 3.6 ± 0.6, p > 0.05, Figure 2D), while its mRNA expression level is statistically significant (1.7 ± 0.2 vs. 1.1 ± 0.1, p = 0.0200, Figure 2A).