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
Emergency radiotherapy is given in
assistant
The correct answer is  Note the swelling of his face first thing in the morning (left) and its resolution after being upright all day (right). Specialty. Pulmonology.
Superior vena cava syndrome (SVCS), is a group of symptoms caused by obstruction of the superior vena cava
(a short, wide vessel carrying circulating blood into the heart).