Pulmonary anisakiasis presenting as eosinophilic pleural effusion.

A 63-year-old man developed a pleural effusion with marked eosinophilia, which was more prominent in the pleural fluid than in the peripheral blood. The pleural effusion spontaneously disappeared 7 days after admission. A multiple dot enzyme-linked immunosorbent assay for anisakiasis was strongly positive for both the serum and pleural fluid.