Intrapancreatic accessory spleen versus a neuroendocrine pancreas tumor: a diagnostic challenge.

The intrapancreatic accessory spleen is a congenital entity whose differential diagnosis is mainly raised with neuroendocrine tumors of the pancreas. Keeping in mind this unfrequent entity and careful interpretation of the imaging tests, especially magnetic resonance imaging, can give us the key to make a correct definitive diagnosis. Successful diagnosis is important in order to try to avoid diagnostic pancreatectomies that could carry out severe morbidity.