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). The gene discussed is FOLH1; the disease is prostate cancer.