This patient's classification of PSC was in line with 2021 WHO Classification of Lung Tumors,1 TTF‐1 is positive (Figure 2C) (Figure S3K), but Napsin A (Figure S2) (Figure S3G) and p40 are negative (Figure S2F) (Figure S3H), suggested that PSC was poorly differentiated NSCLC, favor adenocarcinoma.1 The gene discussed is NAPSA; the disease is non-small cell lung carcinoma.