33 Table 2 Findings Number of cases Percentage (%) Consolidation 36 40 Fibronodular
changes 9 10 Fibrocavitary changes 21 23.
changes with cavities and scarring, mimicking tuberculosis or histoplasmosis, can occur but is not common.
The International Unit Against Tuberculosis (IUAT) trial, conducted in Eastern Europe, randomized approximately 28,000 individuals with positive tuberculin skin tests (TST) and fibronodular
changes on chest X-ray (12).
A chest radiograph revealed a dense infiltrate in the posterior segment of the right upper lung, extensive fibronodular
disease and decreased volume.
The classical radiographic picture mimics reactivation tuberculosis with cavitations and is characterized by progressive fibronodular
opacities (< 5 mm nodules) with cavities.
Patchy areas of fibronodular
changes are noted in left lower lobe with tractional and tubular bronchiectasis in bilateral lung fields (Figure 4).
Examples include apical tuberculous fibronodular
changes, symmetric bilateral ground glass opacities in pneumocystis jiroveci pneumonia, cavitary filling defects of aspergillomas, hepatic and pulmonary hydatid cysts, and pleuroparenchymal changes in paragonimiasis, all of which may calcify, rarely in some cases.