title: Differential diagnosis of bronchiolitis obliterans organizing pneumonia.
abstract: The disease concept of idiopathic BOOP has emerged from a study of many open lung biopsy cases of diffuse infiltrative lung disease. The histopathologic features of idiopathic BOOP have several components: bronchiolitis obliterans, organizing pneumonia, accumulation of foamy cells in the peripheral air spaces, and interstitial infiltration of mononuclear cells. These pathologic findings are nonspecific and many conditions show such a BOOP pattern. Idiopathic BOOP has been discussed in the context of bronchiolitis obliterans, organizing pneumonia, and interstitial pneumonia. While clinically idiopathic BOOP has a relatively broad spectrum of manifestation, BOOP stands as a clinicopathologic disease entity among diffuse infiltrative lung diseases of unknown etiology.
authors.affiliation: Chest Disease Research Institute, Kyoto University, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kitaichi
mesh_terms: D001989:Bronchiolitis Obliterans / Q000175:diagnosis* / Q000473:pathology; D003937:Diagnosis, Differential; D006801:Humans; D008168:Lung / Q000473:pathology; D008171:Lung Diseases / Q000175:diagnosis; D011014:Pneumonia / Q000175:diagnosis* / Q000473:pathology