SULF1 and neoplasm: Taken together, these studies reaffirm our bioinformatics-based analysis and suggest that these extracellular matrix genes (CDH3, COL11A1, COL1A1, COL17A1, KRT19, ITGA2, LAMC2, and SULF1) are highly associated with PDAC tumor carcinogenesis and peritoneal metastasis.