From question on page 10.1136/gut.2006.115014

A distal pancreatectomy was performed. Gross pathology revealed a yellowish, elastic, well-encapsulated tumour measuring 2×2×2 cm, within the pancreatic tail. Microscopically, the tumour showed monotonous tumour cells separated by fibrous stroma, which was arranged in a papillary, glandular, solid or cystic pattern (fig 1). Immunohistochemical staining by the avidin–biotin complex method revealed that the tumour cells were positive for polyclonal AFP antibody (fig 1, inset). …