TTF1 and lung adenocarcinoma: The main markers supporting the diagnosis of MPM include calretinin, CK5/6, WT‐1, mesothelin, and D2‐40, while the main markers supporting the diagnosis of lung adenocarcinoma include TTF‐1, napsin A, carcinoembryonic antigen (CEA), BerEP4, and claudin4.33, 34