TGFB1 and breast angiosarcoma: We discovered that hsa_circ_0009096, a transcription product of the UTRN gene, is located at chr6: 144772505–144780490, and exhibited significant expressional elevation in TGF-β1-treated HSCs, consistent with our previous analysis in clinic samples from patients with BA (Zhang et al., 2023) and the same cell model (Liu et al., 2023).