Genetic Bases of Neuroendocrine Neoplasms in Mexican Patients

Inclusion Criteria: Adult patients with a new or previous clinical diagnosis of any of the following conditions: * Isolated NENs with sporadic presentation, including bronchopulmonary NENs, gastrointestinal NENs, medullary thyroid carcinoma, pancreatic NENs, paragangliomas, pheochromocytomas, pituitary neuroendocrine tumors, and primary hyperparathyroidism. * Familial isolated NENs, including familial isolated pituitary adenoma, familial pheochromocytomas and paragangliomas, familial primary hyperparathyroidism, familial gastrointestinal stromal tumors and X-linked acrogigantism. * Clinical syndromes encompassing NENs, with familial or sporadic presentation, including Carney complex, Carney-Stratakis syndrome, Carney triad, Cowden syndrome, DICER1 syndrome, Li-Fraumeni syndrome, Lynch syndrome, multiple endocrine neoplasia type 1, multiple endocrine neoplasia type 2, multiple endocrine neoplasia type 4, neurofibromatosis type 1, Pacak-Zhuang syndrome, paraganglioma, pheochromocytoma and pituitary adenoma syndrome, tuberous sclerosis complex, Von Hippel Lindau syndrome. Exclusion criteria: * Age \<18 years. * Refusal to give informed consent.