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18009 Pathology

A 35-year-old man has had increasing dyspnea for the past 24 hours. A chest radiograph shows large, bilateral pleural effusions. Thoracentesis yields 500 mL of slightly cloudy yellow fluid from the right pleural cavity. Cytologic examination of the fluid shows many neutrophils, but no lymphocytes or RBCs. Which of the following mechanisms contributes most to the pleural fluid accumulation?

AArteriolar vasoconstriction
BEndothelial contraction
CInhibition of platelet adherence
DLymphatic obstruction
Pathology
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