A very rare malignant epithelial tumour of the pancreas characterised, macroscopically by a usually large well-circumscribed fully or partially encapsulated solid mass often with haemorrhage, necrosis and cystic changes in any portion of the pancreas. Histological characteristics are neoplastic cells with variable degrees of differentiation and morphology ranging from acinar structures similar to normal pancreatic acini to large sheets of poorly differentiated neoplastic cells. Presenting symptoms are typically non-specific and include abdominal pain, weight loss, vomiting, nausea, and/or less commonly jaundice. Immunohistochemical evidence of acinar-specific products is observed. Association with Lynch syndrome, familial adenomatous polyposis, and pancreatic panniculitis has been reported. [from
SNOMEDCT_US]