ERBB2 and gastric cancer: Our previous studies showed that subcutaneous and in situ gastric cancer tissues with 5 mm in diameter could be recognized and treated by using multifunctional nanoprobes such as BRCAA1-conjugated fluorescent magnetic nanoparticles, Her2 antibody-conjugated RNase A-associated CdTe quantum dots, folic acid-conjugated upper conversion nanoparticles, RGD-conjugated gold nanorods, Ce6-conjugated carbon dots, and Ce6-conjugated Au nanoclusters (Au NCs) [10,11].