A 34-year-old patient presents with severe pain in the right upper quadrant that radiates to the right shoulder. During laparoscopic cholecystectomy, which of the following anatomical spaces must be carefully identified to prevent bile duct injury?
AForamen of Winslow
BLesser sac
CCalot's triangle
DMorrison's pouch
During a surgical procedure to repair an abdominal aortic aneurysm, the surgeon must be careful to avoid injury to which of the following arterial structures that originates near the level of the renal vessels?
ALeft renal artery
BCeliac trunk
CRight renal artery
DSuperior mesenteric artery
During a thoracotomy procedure, a surgeon needs to access the posterior mediastinum. Which of the following structures forms the anterior boundary of the posterior mediastinum?
ADescending thoracic aorta
BPericardial sac
CAzygos vein
DThoracic vertebrae
ESternum
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