Diffuse alveolar hemorrhage caused by exposure to organic dust

Diffuse alveolar hemorrhage, a life-threatening disease, can complicate various conditions. We herein describe, for the first time, a patient with diffuse alveolar hemorrhage caused by exposure to organic dust. A 49-year-old woman who worked as a cantaloupe farmer in a greenhouse was referred to our hospital for sudden onset of dyspnea 3 h after exposure to organic dust. A chest X-ray and computed tomography scan performed on admission showed diffuse ground-glass opacities in both lung fields. Suspecting hypersensitivity pneumonitis, fiberoptic bronchoscopy was performed. Mucopurulent sputum was present in the trachea and both bronchi, and bronchoalveolar lavage revealed a progressively bloody return, typical of diffuse alveolar hemorrhage. Based on the history and bronchoscopy findings, she was diagnosed with diffuse alveolar hemorrhage following exposure to organic dust and was treated with antibiotics and corticosteroids. Diffuse alveolar hemorrhage should be considered in the differential diagnosis of diffuse ground-glass opacities observed on radiographs in farmers following exposure to organic dust

Direct pulmonary infiltrates as an initial manifestation of chronic lymphocytic leukemia

An 85-year-old man who did not have any hematological or respiratory disorders was transferred to our hospital because of progressive dyspnea. Computed tomography (CT) findings showed ground-glass opacities with a centrilobular distribution and centrilobular micronodules with a “tree-in-bud” pattern. A biopsy of the lungs showed lymphocytic infiltrations in the parenchyma and these were positive for B cell markers. A diagnosis of chronic lymphocytic leukemia (CLL) was made and direct pulmonary involvement of CLL was confirmed simultaneously. One month after initiation of chemotherapy, his symptoms improved and a chest CT scan showed marked resolution. Pulmonary infiltrates of CLL should be included in the differential diagnosis when these signs are encountered on CT. Keywords: Chronic lymphocytic leukemia, Pulmonary infiltrate, Centrilobular micronodule, “Tree-in-bud” patter

Diffusely distributed centrilobular micronodules and branching opacities as the main chest computed tomography manifestations in a patient with humidifier lung

We report a 60-year-old man with humidifier lung showing diffusely distributed centrilobular micronodules and branching opacities on chest computed tomography (CT). Fever and dyspnea occurred 2 months after using an ultrasonic humidifier. KL-6 and SP-D were within normal ranges. Bronchoalveolar lavage showed elevated lymphocytes (53 %) and histological findings of transbronchial lung biopsy demonstrated organizing pneumonia. His condition improved after cessation of the humidifier. A provocation test exhibited a positive response to the humidifier. Humidifier lung should be considered as a differential diagnosis in patients with these CT findings. Detailed clinical, pathological and microbiological examinations are needed to exclude other diseases