[WHO 2023: A new terminology for pancreaticobiliary cytopathology]

The World Health Organization, the International Academy of Cytology, and the International Agency for Research on Cancer have recently introduced a revised terminology in biliopancreatic cytopathology. This update has several objectives : the development of an international terminology, the standardization of reports, the improvement of communication with clinicians for better patient management, and updating practices related to biliopancreatic cytology in line with the latest WHO guidelines. This new terminology replaces that of the Papanicolaou Society of Cytopathology introduced in 2015. It includes seven categories instead of the six previously used. The main changes involve the integration of benign tumors with non-neoplastic lesions into a single category, as well as the creation of two categories for low-grade and high-grade tumors, primarily focusing on intraductal and mucinous cystic tumors. Another major change is the reclassification of neuroendocrine tumors and pancreatic solid pseudopapillary tumors into the "malignant" category, aligning with the 5th edition of the 2019 WHO classification of digestive tumors. Additionally, the revised system provides diagnostic criteria, malignancy risk assessment, and management recommendations for each category.