FAP-expressing CAFs have been found in over 90% of epithelial carcinomas (Garin-Chesa et al. 1990; Mhawech-Fauceglia et al. 2015), and high FAP expression is associated with poor prognosis and worse treatment outcomes in multiple cancers (Lo et al. 2017; van der Heide & Dalm 2022; Saigusa et al. 2011; Moreno-Ruiz et al. 2021). The gene discussed is FAP; the disease is carcinoma.