KRT5 and lung cancer: For the cohort of 85 primary malignant lung neoplasms (41 ACs and 44 SCCs), including all histological grades, p63 (0.965) had the largest AUC, followed by CK5/6 (0.960), and p40 (0.938), with AUC values >0.9, while AUC values for the remaining markers were between 0.8 and 0.9.