We found that AEG-1 had a remarkably higher expression in adenocarcinoma (P = 0.002), squamous cell carcinoma (P = 0.008), adenosquamous carcinoma (P = 0.008), and undifferentiated carcinoma (P = 0.035) compared to the normal lung (Table 1). Here, MTDH is linked to undifferentiated carcinoma.