A lymphoma that arises from the pancreas with the bulk of the tumor localized to this organ. The vast majority of cases are non-Hodgkin lymphomas of B-cell phenotype and include mucosa-associated lymphoid tissue lymphomas, follicular lymphomas, and diffuse large B-cell lymphomas. The disease is pancreas lymphoma (MONDO_0002114). Also known as: lymphoma of pancreas, lymphoma of the pancreas, pancreatic lymphoma.