An elderly man with nonresolving cough, leukocytosis and a pulmonary mass

A 73-year-old previously healthy man presented to a community hospital with a 2-month history of cough, fever, malaise, night sweats and weight loss. He had a smoking history of 20 pack-years and had quit 15 years before his current illness. He had no history of chest pain, hemoptysis, wheezing or