This study indicated that after 24 hours (post-injection) the accumulation of the radiotracer in the tumor reached its maximum and the tumor site in H441 and FaDu (HER3 positive cell line) xenografted was visualized while the tumor site in Calu-1 (negative HER3 cell line) is not observable (Table 1) (72). The gene discussed is ERBB3; the disease is neoplasm.