Rodzinny guz neuroendokrynowy żołądka typu 1

A rare neoplastic disease characterized by occurrence of atypical and aggressive gastric type 1 neuroendocrine tumors (NET) in early adulthood. The tumors often show nodal infiltration requiring total gastrectomy. Synchronous gastric adenocarcinoma has also been reported. Patients present high serum gastrin concentrations and iron-deficiency anemia (rather than megaloblastic anemia, which is a typical feature in patients with sporadic gastric type 1 NET, where the tumor usually arises on the background of autoimmune atrophic gastritis).