Gastric endocrine tumours constitute less than 1% of all (neuro-)endocrine tumours and less than 2% of all gastrointestinal malignancies. They are classified into three groups: well-differentiated endocrine tumours, well-differentiated endocrine carcinoma, poorly-differentiated endocrine carcinoma. We report the rare case of a patient with a metastasising gastric endocrine tumour that histologically revealed all signs of a well-differentiated endocrine tumour.