Diffuse lesions in both lungs are most often not considered to be respiratory bronchiolitis minor.
Respiratory bronchiolitis is a respiratory disease that may be a nonspecific cellular response to an inhaled irritant.The etiology of respiratory bronchiolitis is unclear, and most patients have a history of smoking.
Diffuse lesions of both lungs are parenchymal and interstitial lesions of the lungs caused by a variety of factors. The more common clinical factors are pneumonia caused by bacteria, viruses, mycoplasma, etc., accompanied by a large amount of inflammatory secretion exudation, which is commonly seen in tuberculosis, interstitial fibrosis, interstitial pneumonitis, allergic alveolitis, tuberculosis, pulmonary vasculitis, pulmonary proteinosis.
Typical chest radiographs of respiratory bronchiolitis do not show obvious pulmonary infiltrates or airway abnormalities, and sometimes bronchial wall thickening or reticular densification is seen. High-resolution CT shows ground-glass shadows and nodular shadows in the center of the lobules. The characteristic pathologic change is chronic inflammation of the respiratory fine bronchi accompanied by macrophage accumulation in the surrounding alveoli.
Patients with diffuse lesions in both lungs who need to clarify the cause of the disease should go to a regular hospital for relevant examinations before a clear diagnosis can be made.