hSSTR2-expressing OV has shown a therapeutic effect of radioactivity accumulation in tumor cells of mice bearing subcutaneous colon cancer xenografts, with a higher concentration of radiotracer in the tumor infected with the SSTR2-expressing oncolytic virus compared to the tumor infected with the control virus, and has allowed non-invasive visualization of the spatial distribution of virus for up to 3 weeks post-viral injection using repeated injections of [111In]In-pentetreotide [113]. Here, SSTR2 is linked to neoplasm.