FLT1 and breast carcinoma: In patients with breast cancer, high VEGFR1 expression levels were associated with an increased risk of death.[17] To the best of our knowledge, only 1 cervical cancer study[18] found that higher VEGFR1 expression levels were significantly associated with poorer progression-free survival (PFS) and overall survival (OS), using a cut-off level of 100 pg/mL.