Investigation
Chest X-Ray
- Best initial test , shows tram track lines ( characteristic sign of bronchial wall thickening)
- Thin-walled cysts (i.e. dilated bronchi forming sacs), possibly with air-fluid levels
- Honeycombing in late-stage bronchiectasis
High-resolution computer tomography (HRCT)
- Is the confirmatory test
- Dilated bronchi with thickened walls; possible signet-ring appearance and tram track lines
- Cysts, especially at bronchial ends in lower lobes, and honeycombing
Other tests
- Sputum culture and smear: to determine infectious etiology (bacteria, mycobacteria, and fungi)
- CBC with differential: ↑ WBCs, ↑ neutrophils
- Pulmonary function tests: findings consistent with obstructive pulmonary disease
- Bronchoscopy