Discussion
Diagnosis With Brief Discussion
- Diagnosis
- Allergic bronchopulmonary aspergillosis (ABPA)
- Radiologic Findings
- Figs 1-2. Axial lung-window CT images reveal multifocal bronchial mucus plugging, bronchial wall thickening, and poorly-defined centrilobular nodules in bilateral lung fields.
Figs 3-4. Axial mediastinal-window CT images obtained at the same level reveal that some of the bronchial mucus pluggings contain high attenuation.
The patient underwent bronchoscopy and thick materials-filled bronchi were found. Results of the histopathologic analysis revealed findings of allergic mucin and aspergillus, which are consistent with allergic bronchopulmonary aspergillosis (ABPA).




- Brief Review
- ABPA is a hypersensitivity reaction to Aspergillus antigens and is usually caused by Aspergillus fumigatus. ABPA is typically seen in patients with long-standing asthma or cystic fibrosis. It is believed that the Aspergillus-specific IgE-mediated type I hypersensitivity reaction and the specific IgG-mediated type III hypersensitivity reactions play an important role in the pathogenesis of ABPA.
Diagnostic criteria include the presence of asthma, peripheral blood eosinophilia, an immediate positive skin test for Aspergillus antigens, increased serum IgE levels, and pulmonary opacity on chest radiographs.
CT findings include mucoid impaction and bronchiectasis involving predominantly the segmental and subsegmental bronchi of the upper lobes, along with centrilobular nodules or branching linear structures. In approximately 30% of patients, the impacted mucus is highly opaque or demonstrates frank calcification at CT.
The differential diagnosis includes other causes of mucoid impaction such as endobronchial lesions, bronchial atresia, bronchiectasis, and bronchial asthma.
- References
- 1. Yeon Joo Jeong,, Kun-Il Kim et al. Eosinophilic Lung Diseases: A Clinical, Radiologic, and Pathologic Overview. RadioGraphics 2007; 27:617– 639.
2. Toma´ s Franquet, Nestor L. Mu¨ller et al. Spectrum of Pulmonary Aspergillosis: Histologic, Clinical, and Radiologic Findings. RadioGraphics 2001; 21:825–837.
3. Ritesh Agarwal, Ajmal Khan et al. Chest radiographic and computed tomographic manifestations in allergic bronchopulmonary aspergillosis. World J Radiol 2012 April 28; 4(4): 141-150.
- Please refer to
- Case 122 Case 158 Case 665 Case 944 Case 1162
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- Keywords
- Allergic Bronchopulmonary Aspergillosis (ABPA),