Prostate cancer C4-2B cells and non-cancerous HS-5 stromal cells were imaged with fluorescence of AlexaFluor488 marker (targeted with prostate cancer-specific PSMA antibody), scattering by gold NPs (targeted with the same antibody) and scattering of the PNBs generated around gold NPs (Figure 8). Here, FOLH1 is linked to Familial prostate cancer.