Radiographic abnormalities — The most common abnormality on chest radiography was hilar adenopathy, occurring in 65 percent [2]. Hilar changes could be seen as early as one week after skin test conversion and within two months in all cases. These radiographic findings resolved slowly, often over a period of more than one year. Approximately one-third of the 517 converters developed pleural effusions, typically within the first three to four months after infection, but occasionally as late as one year. Pulmonary infiltrates were documented in 27 percent of patients. Perihilar and right sided infiltrates were the most common, and ipsilateral hilar enlargement was the rule. While contralateral hilar changes.
