In a sporadic IPF patient and a PF TOM1L2 c.421T > C carrier, TOM1L2 positive staining was present in non-fibrotic (B,D) and fibrotic (C,E) lung tissue in (hyperplasic) AT2 cells, but also in unspecified proSP-C negative cells. This evidence concerns the gene TOM1L2 and idiopathic pulmonary fibrosis.