F2R and ovarian cancer: Most interestingly, for the F2R protein expression in chemotherapy-sensitive versus chemotherapy-resistant HGSOC tissues, the maximum F2R H-score revealed the chemotherapy-resistant ovarian cancer samples to exhibit higher F2R protein levels compared to cancers from chemotherapy-sensitive HGSOC patients (Figure 3H–J), indicating that F2R could have prognostic potential as a chemotherapy resistance marker and also be a target for future theranostic strategies.