The SSTRs expression on SCLC cells provided the molecular basis for the successful use of radiolabel synthetic analogs, such as the 68Ga/177Lu/90Y-labeled compounds DOTATATE/-TOC and 111In--DTPA-D-Phe1-octreotide scan, which binds with high affinity to SSTR2a, and with moderate affinity to SSTR3 and SSTR5, to detect tumors [15,16,17,18]. The gene discussed is SSTR5; the disease is small cell lung carcinoma.