KRT7 and mucinous adenocarcinoma: These samples were classified by the authors of the data based on the WHO basis for histological morphology and molecular typing, based on labeling by immunohistochemical P63/Napsin A and TTF-1/CK7 double staining, and were divided into the following five groups according to tissue origin: bronchoalveolar carcinoma, alveolar epithelial carcinoma, bronchial epithelial carcinoma, secretory adenocarcinoma, and mucinous adenocarcinoma.