FLT1 and neoplasm: Following a treatment duration of 27 days, the tumor weights in the control group, SIRPα-Fc + VEGFR1-Fc group, and SIRPα-VEGFR1 group were measured at 905.30 ± 167.60 mg, 72.82 ± 8.65 mg, and 83.30 ± 11.71 mg, respectively.