Table 3. Radiological changes in allergic bronchopulmonary asperillosis
Plain chest radiology
    Transient changes
        Perihilar infiltrates simulating adenopathy
        Air–fluid levels from dilated central bronchi filled with fluid and debris
        Massive consolidation: unilateral or bilateral
        Radiological infiltrates
        “Toothpaste” shadows due to mucoid impaction in damaged bronchi
        “Gloved finger” shadows from distally occluded bronchi filled with secretions
        “Tramline” shadows representing oedema of the bronchial walls
        Collapse: lobar or segmental
    Permanent changes
        Central bronchiectasis with normal peripheral bronchi
        Parallel-line shadows representing bronchial widening
        Ring-shadows 1–2 cm in diameter representing dilated bronchi en face
        Pulmonary fibrosis
        Late changes: cavitation, contracted upper lobes and localised emphysema
Computed tomography findings
    Bronchial abnormalities
        Bronchiectasis, usually central, as characterised by the “signet ring” and “string of pearls” appearances
        Dilated bronchi with or without air–fluid levels
        Totally occluded bronchi
        Bronchial wall thickening
        Parallel-line opacities extending to the periphery
        High attenuation mucus plugs
    Parenchymal changes
        Non-homogeneous patchy opacities
        Parenchymal scarring of varying extent
        Segmental or lobar collapse
        Emphysematous bullae
    Pleural involvement
        Pleural effusions
        Spontaneous pneumothorax
        Bronchopleural fistula
        Pleural fibrosis
        Pleural thickening
  • Information from [1, 93].