Diseases that typically are not diagnosed with FOB that are progressive include pulmonary vasculitis syndromes, cryptogenic-organizing pneumonia (COP) and the various forms of diffuse alveolar damage.

Diagnostic and Interventional Imaging (2014). [3] Cryptogenic and Secondary Organizing Pneumonia Clinical Presentation, Radiographic Findings, Treatment Response, and Prognosis. CHEST Journal (2010).

T-DXd‒related pneumonitis most commonly presented with cryptogenic organizing pneumonia (COP) pattern, observed in 65 patients (72%), followed by a newly identified COP/hypersensitivity pneumonitis ...

Radiologic features of DRP on CT scans included organizing pneumonia (38%), simple pulmonary eosinophilia (26%), hypersensitivity pneumonia (23%), diffuse alveolar damage (11%) and nonspecific ...