Pancreatic mucinous cystic neoplasm, also mucinous cystic neoplasm of the pancreas and mucinous cystic tumour, is a grouping of cystic neoplasms that arise from the pancreas. They may be benign, malignant or in between. The prognosis of this set of tumours is highly variable and dependent on the specific sub-classification (benign, borderline, malignant).