Another recent study revealed that the onocytic subtypes of IPNB and IPMN showed different expression patterns in several signaling pathways, increased expression of follistatin (FST) and lower apoptotic activity relative to those of the other subtypes of IPNB and IPMN [154], suggesting a common molecular signaling pathway in oncocytic IPNB and IPMN [113]. This evidence concerns the gene FST and pancreatic intraductal papillary-mucinous neoplasm.