This signature included the SQ positive markers KRT5 (CK5), TRIM29, and SLC7A5 (AUC 0.98, 0.93, and 0.83, respectively, in our analysis) and the AD positive markers MUC1 and CEACAM5 (AUC 0.81 and 0.78, respectively, in our analysis) (30). Here, CEACAM5 is linked to Alzheimer disease.