In addition, there was a reduction in the percentage of cells expressing only TNFR2: 57.3% in healthy volunteers, 2.2% in the patients with mild BA (p = 0.032), 4.4% in the patients with moderate BA (p = 0.0002), and 46.5% (p > 0.999) in the patients with severe BA. The gene discussed is TNFRSF1B; the disease is breast angiosarcoma.