Presentation of CaseA 44-year-old woman was admitted to the hospital because of a thoracic mass.She was well until five weeks earlier, when symptoms of a respiratory-tract infection developed. Fatigue and a nonproductive cough persisted. Ten days before entry she noticed an intermittent "weighty" sensation in the anterior portion of the chest that occasionally radiated to the back. An x-ray film of the chest, obtained elsewhere, was reported to show a large hilar mass. She was referred to this hospital.She had smoked 1 1/2 00BDackages of cigarettes daily for 30 years. During the year before admission she had . . .
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