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Organizing pneumonia. (a) Axial and (b) coronal images in lung windows in a 43-year-old man with a history of follicular lymphoma demonstrate predominantly peripheral ground-glass opacities (arrow). The patient had undergone chemotherapy and was admitted for respiratory failure. Lung biopsy yielded organizing pneumonia. The patient did well on steroids and was discharged.
Parekh, M et al Review of the Chest CT Differential Diagnosis of Ground-Glass Opacities in the COVID Era Radiology Vol. 297, No. 3 July 2020 -
Small Airway Disease – Organizing Pneumonia – Terminal Bronchiole
Hypersensitivity pneumonitis-organizing pneumonia Case 129
Areas of organizing pneumonia are frequently seen in hypersensitivity pneumonitis.
Courtesy Dr Yale Rosen- cryptogenic or secondary organizing pneumonia (OP),
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Histopathology of organizing pneumonia (or BOOP), characterized by intraluminal plugs of proliferating fibroblasts that fill distal airways and peribonchiolar air spaces
Ryu, J Pulmonary Medicine Bronchiolitis Pulmonology Advisor