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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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MEN 1 syndrome is associated with all EXCEPT
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The correct answer is  Medullary carcinoma of thyroid REF: Harrison's Internal Medicine 17th ed Chapter 345 Table 345-1, http://en.wikipedia.org/ wiki/Multiple_endocrine_neoplasia Some people think that option (D) was Pheochromocytoma not Medullary carcinoma of thyroid. However Table 345-1 of Harrison enumerates Pheochromocytoma as a rare possibility of MEN 1 but its text does not describes it like most other references. Feature MEN 1 MEN 2A MEN 2B Eponym Wermer syndrome Sipple syndrome Williams-Pollock syndrome, Gorlin-Vickers syndrome, and Wagenmann-Froboese syndrome Entero-Pancreatic tumors gastrinoma (50W, insulinoma (20%), vipoma, glucagonoma, PPoma - ? Pituitary adenoma 66% - - Parathyroid hyperplasia 90% 50% ? Medullary thyroid carcinoma 100% 85% Pheochromocytoma >33% 50% Marfanoid body habitus - 80% Mucosal neuroma - - 100% Gene(s) MEN1 RET RET Approx. prevalence 1 in 35,000 (1 in 20,000 to 1 in 40,000) 1 in 40,000 1 in 40,000 Primary hyperparathyroidism is the most common manifestation of MEN1 Hyperparathyroidism is the earliest manifestation of the syndrome in most MEN1 patients. Enteropancreatic tumors are the second most common manifestation of MEN1 Gastrinomas are the most common enteropancreatic tumors observed in MEN1 patients Insulinomas are the second most common enteropancreatic tumors in patients who suffer from MEN1. Unlike gastrinomas, most insulinomas originate in the pancreas bed, becoming the most common pancreatic tumor in MEN1