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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.
user
Which is the most common tumor associated with superior vena cava syndrome?
assistant
The correct answer is  The superior vena cava syndrome usually is caused by neoplasms that compress or invade the superior vena cava, such as bronchogenic carcinoma or mediastinal lymphoma. -produces a characteristic clinical complex consisting of marked dilation of the veins of the head, neck, and arms associated with cyanosis. -Pulmonary vessels also can be compressed, causing respiratory distress.