The expression levels of c‐Kit in leukemia (Kasumi‐1), mast cell tumor (HMC1.2), GIST (GIST‐T1, GIST‐430, GIST‐430/654), and SCLC (NCI‐H526, NCI‐H889) cell lines were higher than those in other cell lines (Fig. S1). Here, KIT is linked to mast cell neoplasm.