Table 2 Classification of Papanicolaou Society for assessment of cytological sampling of the pancreatobiliary system. (NET - neuroendocrine tumor; IPMN - intraductal papillary mucinous neoplasm; MCN - mucinous cystic neoplasm)
Papanicolaou society of cytopathology system for reporting pancreaticobiliary cytology | |
|---|---|
I. Non-diagnostic | |
II. Negative (for malignancy) | Benign pancreatic tissue Acute, chronic or autoimmune pancreatitis Pseudocyst, lymphoepithelial cyst Splenule/accessory spleen |
III. Atypical | |
IV. Neoplastic - Benign | Serous cystadenoma Neuroendocrine microadenoma Lymphangioma |
IV. Neoplastic - Other | Well-differentiated NET IPMN, all grades of dysplasia MCN, all grades of dysplasia Solid-pseudopapillary neoplasm |
V. Suspicious (for malignancy) | |
VI. Positive or Malignant | Ductal adenocarcinoma of the pancreas and its variants Cholangiocarcinoma Acinar cell carcinoma Poorly differentiated (small and large cell) NET Pancreatoblastoma Lymphoma Metastatic malignancy |