Metamorphoses in pancreatic cancer precursors: the role of simple mucinous cysts ^†

Pancreatic cystic lesions present a unique opportunity to identify and potentially prevent pancreatic ductal adenocarcinoma (PDAC), one of the deadliest solid tumors. Until now, research has primarily focused on intraductal papillary mucinous neoplasms (IPMNs) and mucinous cystic neoplasms (MCNs), whose potential for malignant transformation is well established. In recent years, however, a new pathological entity has emerged: the simple mucinous cyst (SMC). SMCs are distinct from other cystic lesions, as they lack both communication with the pancreatic ductal system (a hallmark of IPMNs), and the ovarian-like stroma, characteristic of MCNs. The recent work by Pea et al, published in The Journal of Pathology, suggests that these lesions can progress to PDAC, underscoring the need for further characterization. In this commentary, we review the key findings of this study and discuss the potential next steps required to translate these discoveries into actionable clinical practice. © 2025 The Pathological Society of Great Britain and Ireland.