TMPRSS2 and malignant colon neoplasm: Also, in GSE146771, among 4231 non-epithelial cells from human colon cancer tissues, ACE2 was expressed by 3% of fibroblasts; TMPRSS2 was expressed by 12% of B cells, 21% of fibroblasts, 10.6% of innate lymphoid cells, 11.9% of macrophages, and 10.3% of T cells (Fig. 4D).