XPO1 is highly expressed in a variety of solid tumors, such as small cell lung cancer, cholangiocarcinoma and liver cancer, which is associated with a poor clinical outcome.[19] By analyzing the expression of XPO1 in BLBC through GEPIA and TCGA online databases, we found that compared with normal breast tissue, XPO1 mRNA is also highly expressed in BLBC tumor tissues (Figure1A,B). Here, XPO1 is linked to small cell lung carcinoma.