IDO1 and pachyonychia congenita: However, no obvious difference between the expression of TGFB1 (Figure 4(a)), PVRL2 (Figure 4(b)), CSF1R (Figure 4(c)), TGFBR1 (Figure 4(d)), LGALS9 (Figure 4(f)), KDR (Figure 4(h)), and IDO1 (Figure 4(i)) and the stage in the PC patients was taken on.