MUC5AC and lung adenocarcinoma: ALK-rearranged lung adenocarcinoma was significantly associated with the following morphological characteristics: cribriform formation (odds ratio [OR], 3.253; p = 0.028), presence of mucin-containing cells (OR, 4.899; p = 0.008), close relationship to adjacent bronchioles (OR, 5.361; p = 0.001), and presence of psammoma bodies (OR, 4.026; p = 0.002).