Presentation of Case A 41-year-old physician was admitted to the hospital because of pneumonia. He was well until 2 1/2 weeks earlier, when vague myalgias developed, with rise of the temperature to nearly 39°C. He took acetaminophen, with symptomatic improvement, and the temperature gradually returned to normal during the next 10 days. Four days before entry he began to have left pleuritic pain, a mild nonproductive cough and slight dyspnea. On the next day he saw his physician, who found that he was afebrile. Coarse rales were heard over the left anterior and lateral portions of the thorax, without consolidative.
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