A case of ectopic endocrine pancreatic tumour that had developed within the spleen of a 46-year-old man is reported. The tumour was highly vascularized through the splenic artery, angiographically simulating an angiosarcoma. The histological pattern was typical of an endocrine tumour, and its nature was confirmed by a positivity for keratin, chromogranin A and somatostatin. Foci of atrophic pancreatic tissue were detected in the tumour capsule.