Where in the lung is pulmonary embolism most frequently observed?
a. Right lower lobe
b. Lingula
c. Left lower lobe
d. Right middle lobe
ANS: A
Pulmonary embolism is more frequently observed in the lower lobes and more commonly in the right rather than in the left lung, a phenomenon related to the pulmonary flow distribution that tends to favor the right side and the lower lobes.
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