Exosomal lncARSR promotes RCC resistance to sunitinib by competitively binding to miR‐34/miR‐449 and promoting the expression of AXL and c‐met in RCC cells (Figure 3).[120] Kang et al. demonstrate that lncRNA PART1 is highly expressed in gefitinib‐resistant ESCC cells and is transmitted to sensitive cells by exosomes, thus spreading gefitinib resistance. The gene discussed is PART1; the disease is esophageal squamous cell carcinoma.