Modern approaches to the treatment of gastric neuroendocrine tumors

Gastrointestinal neuroendocrine tumors (GI-NETs) include a wide range of tumors with different variants of the course of the disease. At the one end of the clinical spectrum there are highly differentiated type I GI-NETs, with five-year survival rate over 95%, at the another end there are low-differentiated neuroendocrine carcinoma (large-, smallcell cancers) representing a tumor with extremely poor prognosis. Therapeutic approaches to different types of tumors are different. It is necessary to distinguish the treatment of well-differentiated neuroendocrine neoplasms (I and II clinical-morphological type) and low-differentiated neuroendocrine carcinomas. At the same time, it should be noted how different is the treatment of well-differentiated neuroendocrine tumors with high proliferative activity index (III clinico-morphological type of tumor) and low-differentiated neuroendocrine carcinomas (large-, small-cell cancers).