In the total T cell population, all the patients with BA had significantly higher percentages of cells exclusively expressing TNFR1: 3.46% in healthy volunteers, 24.87% in patients with mild BA (p = 0.027), 13.07% in patients with moderate BA (p = 0.005), and 22.1% in patients with severe BA (p = 0.034). Here, TNFRSF1A is linked to breast angiosarcoma.