This is a histological classification of tumours and tumour-like lesions of the exocrine pancreas which also includes those tu- mours showing a mixture of exocrine and endocrine elements. The classification is based principally on standard microscopic observations, but whenever indicated it incorporates diagnosti- cally valuable immunohistological findings. In addition, the most important immunohistological findings which are helpful in cat- egorizing pancreatic tumours are summarised in Table 1. The major guideline of this classification scheme is the group- ing of the pancreatic exocrine...