For example, the detection of a glycan variant on MUC5AC mucin, using the lectin wheat-germ agglutinin, allows discrimination between MCN and IPMN from benign cystic lesions when used in combination with cyst fluid CA 19-9 with a better sensitivity and sensibility. This evidence concerns the gene MUC5AC and pancreatic intraductal papillary-mucinous neoplasm.