question: Which neuroendocrine tumors are associated with specific tumor syndromes?
answer: Neuroendocrine tumors are a heterogeneous group of benign and malignant neoplasias, detectable in the context of hereditary tumor syndromes in up to 30% of cases. Neuroendocrine tumors include medullary thyroid carcinoma, gastroenteropancreatic tumors, pheochromocytoma, and paraganglioma.