system
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.
user
All of the following are features of MEN IIa, except-a) Pituitary tumorb) Pheochromocytomac) Medullary carcinoma thyroidd) Neuromas
assistant
The correct answer is  None