We used SingleCellNet (Tan and Cahan, 2019) to compare the Basal-SCCIS-tumor/normal with the populations defined in Ji et al. The attribution plot and classification heatmap showed a strong similarity between Basal-SCCIS-tumor and Tumor_KC_Basal subcluster in Ji et al. Importantly, about 10% of Basal-SCCIS-tumor cells were classified as TSK (Figure 4—figure supplement 4A and B). Here, TSKU is linked to neoplasm.