KRT18 and neoplasm: This approach uncovered 20 distinct cell types representing multiple known lymphoid, myeloid, and stromal populations associated with the KP tumor model, including 4 distinct subpopulations of tumor cells, termed Sox4+ Tumor, Krt+ Tumor (defined by upregulation of multiple keratin genes, including Krt19, Krt18, Krt7), Sftp+ Tumor (defined by upregulation of surfactant genes, including Sftpb, Sftpc, Sftpd), and a Quiescent Tumor cell type (Fig. 4b, c, Supplementary Data 4).