FOLH1 and neoplasm: Preoperative SPECT/CT visualization and radio-guided removal of PSMA-positive lesions using the compound had also been successfully demonstrated.130 Furthermore, FIGS was among the biophotonic-based techniques, which had been studied for its potential in tumor surgery.131,132 Several fluorescent probes were developed for FIGS, such as IRDye800CW-suberoylanilide hydroxamic acid (SAHA) (Figure 6).