The twenty-six variants identified in 22 of the BA cases were ABCB4, ABCC2, ATP8B1, JAG1, KCNH1, KMT2D, MYO5B, SLCO1B1, TJP2, and UGT1A1 (shown in Table 2). The gene discussed is KMT2D; the disease is breast angiosarcoma.