DISCUSSION: Organizing pneumonitis is a nonspecific histopathologic diagnosis. It can be seen as a focal radiological finding in up to 13 percent of cases1. It is often confused for malignancy, where even positive emission tomography (PET) scan can show a hypermetabolic state. OP has many possible etiologies1,2, infection was only found in 12 percent of cases1. Most cases did not have an obvious etiology and were presumed to be consistent with crypotgenic organizing pneumonia1,2. Our patient was on long-term oral steroid supplementation secondary to recurrent asthma exacerbations with recent taper to prednisone 5mg daily. On admission, was found to have a very low AM cortisol level of 3, indicative of possible secondary adrenal insufficiency. We hypothesize that this is a possible provoking factor in her developing organizing pneumonitis. Although surgery is both diagnostic and curative, pulmonary resection should be avoided, as OP has a benign course3.