FOLR1 and neoplasm: Membranous staining of moderate or strong intensity in ≥ 75% of viable tumor cells was considered positive, in accordance with criteria for FOLR1-targeted therapy.<h4>Results</h4>Positive FOLR1 expression was observed in 116 of 229 (50.7%, 95% CI 44.2-57.2) analyzed tumors, with 40% showing high expression.