Uncommon tumors of the pancreas are of increasing interest for clinicians: cross imaging techniques development makes it possible to detect small lesions in the pancreatic gland of asymptomatic patients, and in the last decades a more detailed and specific pathological classification definitivelyopened an unexpected world of more or less rare pancreatic tumors. As a matter of fact, nowadays most surgical procedures deal with these so called uncommon pancreatic tumors such as cystic, endocrine and others unfrequent histotypes, and many patientsexperiencing an accidental discovery of this type of tumor need therefore a specialistic evaluation. The concept behind this volume is the need to give the correct clinical relevance to these "uncommon" tumors, that are ranked at the first place among pancreatic tumors, and that are definitively curable with a multimodal approach. Aim of the book is therefore to get clinicians closer to these pathologies, describing their complexity and the current state of the art in diagnostic, therapeutic and pathological classification strategy, thus providing them with the tools for a modern and updated clinical management of these patients.