Malignant Branch Duct Intraductal Papillary Mucinous Neoplasia Mimicking Pancreatic Pseudocyst

Abstract

EUS-FNA revealed a cystic lesion (6.5 x 5.3 cm) with thickened wall and intramural nodule (FIGURE 2). The aspirated liquid was yellow and the biochemistry presented amylase 8 U/L, CEA 651.8 U/L and CA19.9 140,000 U/L. Microhistology found foveolar and atypical cylindrical cells, basal nuclei and mucinous cytoplasm, confirming the diagnosis of an intraductal papilary mucinous neoplasia (IPMN).