Background: Because reports of bronchiolitis obliterans organizing pneumonia (BOOP) are lacking from the Middle East, we conducted a retrospective review of of all histopathologically proven cases of BOOP over a 10-year period at three tertiary care hospitals in Riyadh and describe the clinical features and outcome.
Methods: Charts at the three hospitals were searched using a specific code for BOOP or cryptogenic organizing pneumonia (COP). Lung specimens had to show histological proof of BOOP with a compatible clinical picture.