EMP1 and neoplasm: No metastasis was detected in the lymph nodes or lung of the control group, while six mice injected with FLAG-EMP1-LNCaP cells exhibited metastatic lesions in the lymph nodes and/or lung; five mice in the lymph nodes, three mice in the lung, and two mice in both lymph nodes and lung (Table 1; Fig. 2d, e), suggesting that EMP1 could promote tumor metastasis.