Among the twelve common DEGs, SALL4, WNT10A, RASAL1, CAMK2B were significantly upregulated while GADD45B, KLF4, OLR1, CSF3, WIF1, RAMP3 and AGER downregulated in both sarcoidosis and LC as compared to the controls. Here, KLF4 is linked to sarcoidosis.