The aortic hiatus is formed by the right and left crura of the diaphragm. Which of the following structures does NOT pass through the aortic hiatus?
AThoracic duct
BLeft vagus nerve
CLeft gastric vein
DAzygos vein
CT scan of abdomen showing a structure branching within the liver. Identify the structure.
APortal vein
BSuperior vena cava
CInferior vena cava
DSplenic vein
When a lumbar puncture is performed to sample cerebrospinal fluid, which of the following external landmarks is the most reliable to determine the position of the L4 vertebral spine?
AThe iliac crests
BThe lowest pair of ribs bilaterally
CThe inferior angles of the scapulae
DThe posterior superior iliac spines
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