Fig. 26a–c.

Bronchiolitis obliterans with organizing pneumonia (BOOP) mimicking pneumonia. A 62-year-old woman with a 3 month history of subfebrile temperatures, cough, and failure of response to several antibiotic regimens. a The plain chest radiogram demonstrates “ground-glass” opacities in the right middle and lower lung fields as well as in the left upper lobe and left lower lobe. b,c At CT, alveolar consolidation is seen in the periphery of both upper lobes and both lower lobes. The distinct peripheral location of the abnormalities and the discretely ectatic airways raised the suspicion of BOOP. The diagnosis was confirmed through video-assisted fluoroscopic biopsy