Surgery, when possible, is the treatment of choice for the uncommon endocrine tumours of pancreas. Unresectable cases are usually treated with cytostatic drugs or alpha-interferon. We describe a patient with unresectable, locally advanced endocrine pancreatic carcinoma (measuring 5 x 5 x 6 cm) that was totally cured by external radiation therapy only (40 Gy). This case together with four cases in the literature indicate that external radiation therapy should be considered in locally unresectable endocrine pancreatic carcinomas.