CEACAM5 and neoplasm: For this reason, some studies have focused on the combined detection of CA19-9 together with other tumor markers such as carcino-embryonic antigen (CEA), carbohydrate antigen 125 (CA125), carbohydrate antigen 242 (CA242), and on novel serum biomarkers [129], microRNAs [130] or new imaging techniques such as endoscopic retrograde cholangio pancreatography and endoscopic ultrasonography [131, 132].