Increased MFAP4 expression was observed in the pancreatic ductal adenocarcinoma (PDA) stroma, with MFAP4 identified as a carrier of the tumor-associated carbohydrate sialyl-Lewis x, suggesting this MFAP4 glycoform as a potential PDA biomarker [105]. The gene discussed is MFAP4; the disease is pancreatic ductal adenocarcinoma.