LRRC19 and colitis: Because immune cells such as DCs, adaptive lymphocytes (including Th1 and Th17 cells), and immunoregulatory cells such as regulatory T (Treg) cells play critical roles in colitis and colitis-associated cancer (Nguyen et al., 2015), we examined the composition and absolute numbers of immune cells in the LPs, PPs, and MLNs of WT and Lrrc19 KO mice.