Nonstandard abbreviations used: positron emission tomography (PET); fluorodeoxyglucose (FDG); radiolabeled antisense oligonucleotide (RASON); human dopamine 2 receptor (hD2R); human somatostatin receptor subtype 2 (hSSTR2); human sodium iodide symporter (hNIS); 9-(4-fluoro-3-hydroxymethylbutyl) guanine (FHBG); 2′-fluoro-2′-deoxy-1-β-D-arabinofuranosyl-5-iodouracil (FIAU); gastrointestinal stromal tumor (GIST); carcinoembryonic antigen (CEA); HSV1-tk and enhanced GFP fusion gene (TKeGFP); N, N′-bis (2-chloroethyl)-N-nitrosourea (BCNU); prostrate-specific antigen enhancer (PSE); two-step transcriptional amplification (TSTA); dihydrofolate reductase (DHFR); nuclear factor of activated T cells (NFAT).