In a more advanced stage of endometrosis, in category IIB vs I, DEGs were annotated to the pulmonary fibrosis idiopathic signaling pathway (e.g. ACTA2, AREG, ADAMTS1, WNT4, WNT11), growth of connective tissue (e.g. AGER, TIMP1) and cell proliferation of fibroblasts (e.g. AGER, FADD, FTH1, MED31, NUPR1, PDGFD, SERPINE1, TGFB1I1). Here, FTH1 is linked to pulmonary fibrosis.