Fujimoto S, Muguruma N, Nakao M, et al. - Utilizing the novel fluorescent probe indocyanine green‐labeled dasatinib (ICG‐dasatinib), researchers sought to produce a near‐infrared fluorescent imaging technology for gastrointestinal stromal tumors (GISTs) targeting c‐KIT and to examine the antitumor effect of ICG‐dasatinib on GIST cells. By labeling linker‐induced dasatinib with ICG derivative ICG‐ATT, ICG‐dasatinib was synthesized. Human GIST cell lines GIST‐T1 and GIST‐882M were incubated with ICG‐dasatinib and examined via fluorescent microscopy. According to results, strong fluorescent signals of ICG‐dasatinib were noted in both GIST cell lines in vitro. Findings suggested that ICG‐dasatinib might visualize GIST cells and xenografted tumors. ICG-dasatinib has retained the antitumor effect to the same degree as imatinib.