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
A 45-year-old tall, thin, male has acute onset of chest pain radiating into the back. In the emergency room his right radial pulse is bounding but his femoral pluses are absent. The most likely diagnosis is? SELECT ONE.
assistant
The correct answer is  Aortic dissection. This describes a patient with Marfan syndrome, who are typically at risk for aortic dissection. With dissection you may preserve right radial pulse but lose femoral pulses.