PLE-251

A 52-year-old male has had a chronic cough with occasional low volume hemoptysis for the past three weeks. He is a two-pack-per-day cigarette smoker and drinks three to four cans of beer on weekends. Physical examination reveals right-sided face and right arm swelling, as well as engorgement of subcutaneous veins on the right side of the neck. Which of the following veins is most likely obstructed in this patient?