Bronchiolitis obliterans organizing pneumonia (BOOP) is an inflammation of the bronchioles and surrounding tissue in the lungs. It is an non infectious pneumonia. BOOP is often caused by a pre-existing chronic inflammatory disease like rheumatoid arthritis. BOOP can also be a side effect of certain medicinal drugs, e.g. amiodarone. BOOP was discovered by Dr. Gary Epler in 1985. It is also known as cryptogenic organizing pneumonia (COP), and some sources recommend using the latter term, to reduce confusion with bronchiolitis obliterans. The clinical features and radiological imaging resemble infectious pneumonia...