Discussion
Diagnosis With Brief Discussion
- Diagnosis
- Diffuse alveolar hemorrhage
- Radiologic Findings
- Fig 1. Chest radiograph showed bilateral multifocal consolidation and ground-glass opacities.
Fig 2-4. Chest CT angiography revealed multifocal central consolidation and ground-glass opacities at both lungs. There was no pulmonary thromboembolism.
- Brief Review
- Bronchoscopy revealed diffuse hemorrhage without endobronchial lesions. Bronchoalveolar Lavage was done at RUL anterior segmental bronchus, and the color of the fluid became more sanguineous during the three sequential lavages. The patient was diagnosed to have diffuse alveolar hemorrhage.
Diffuse alveolar hemorrhage (DAH) is a potentially life-threatening syndrome causing respiratory failure. Suspicion of DAH could be difficult, as symptoms and radiologic findings are nonspecific. Hemoptysis is absent for up to one-third of the patients. Once the diagnosis is established, the underlying cause must be established in order to initiate treatment.
Radiologic findings are similar to the other disease with acute alveolar filling processes. The exact pattern may vary depending on the underlying causes. In the acute phase, lobular or lobar ground-glass opacities to predominant consolidation could be demonstrated due to subtotal alveolar filling with blood. In 2-3 days, intralobular lines and smooth interlobular septal thickening may appear, sometimes giving rise to a crazy-paving pattern. Interstitial fibrosis can appear due to severe repeated hemorrhage.
Flexible bronchoscopy with bronchoalveolar lavage (BAL) should be performed to establish the clinical diagnosis of DAH and to exclude infections. Progressively hemorrhagic BAL in serial samples is diagnostic of DAH but not the underlying cause. Surgical lung biopsy could be required to find out the cause of the disease if serologic testing or clinical history is uncertain. Pulmonary capillaritis is the most typical histologic finding of DAH, whose appearance consists of an interstitial neutrophilic predominant infiltration, fibrinoid necrosis, and leukocytosis. Pulmonary capillaritis can be developed in association with various underlying diseases including vasculitis, systemic lupus erythematosus, connective tissue disease, or Henoch-Schönlein purpura.


- References
- 1. Lara AR, Schwarz MI. Diffuse alveolar hemorrhage. Chest. 2010;137(5):1164-1171.
2. Cortese G, Nicali R, Placido R, Gariazzo G, Anrò P. Radiological aspects of diffuse alveolar hemorrhage. Clinical Imaging. 2008;32(4):331.
3. Kim D, Choi J, Cho S-K, et al. Clinical characteristics and outcomes of diffuse alveolar hemorrhage in patients with systemic lupus erythematosus. Seminars in arthritis and rheumatism: Elsevier, 2017; p. 782-787.
4. Johkoh T, Itoh H, Müller NL, et al. Crazy-paving appearance at thin-section CT: spectrum of disease and pathologic findings. Radiology. 1999;211(1):155-160.
5. Schwarz M, Mortenson R, Colby T, et al. Pulmonary capillaritis. The association with progressive irreversible airflow limitation and hyperinflation Am Rev Resp Dis. 1993;148:507-511.
- Please refer to
- Case 1112 Case 518
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- Keywords