A 24-year-old woman presents to the clinic for preoperative evaluation for a scheduled right anterior cruciate ligament repair. Preoperative clearance was requested by the surgeon secondary to the patient complaining of chest pain. Review of systems is positive for a chronic nonproductive cough, chest pain, fatigue, and weight loss. She denies any history of tobacco use. A chest radiograph reveals bilateral hilar adenopathy with symmetric enlargement of the hila. Serum angiotensin-converting enzyme levels are ordered and found to be elevated. What is the most likely diagnosis? Sarcoidosis What is the best therapy for an ascending aortic dissection? Emergent open surgical repair Why must the preoperative preparation for surgical resection of a patient with a diagnosed pheochromocytoma involve propranolol initiation after a 10-14 day course of phenoxybenzamine? To avoid unopposed apha-adrenergic receptor stimulation A 45-year-old man with a past medical history significant for obesity, status post partial gastrectomy, returns to the clinic following a recent barium swallow study for complaints of abdominal pressure and fullness. Results from the study show displacement of the gastroesophageal junction and herniation of a portion of the gastric fundus into the thoracic cavity. Which of the following is the most likely diagnosis? A) Esophageal motility disorder B) Esophagitis