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  2. Ground-glass opacity - Wikipedia

    en.wikipedia.org/wiki/Ground-glass_opacity

    A reversed halo sign is a central ground-glass opacity surrounded by denser consolidation. According to published criteria, the consolidation should form more than three-fourths of a circle and be at least 2 mm thick. [12] It is often suggestive of organizing pneumonia, [13] but is only seen in about 20% of individuals with this condition. [12]

  3. Chest radiograph - Wikipedia

    en.wikipedia.org/wiki/Chest_radiograph

    ground glass; consolidation (diffuse opacity with air bronchograms) location (where is the lesion worst?) upper (e.g., sarcoid, tuberculosis, silicosis/pneumoconiosis, ankylosing spondylitis, Langerhans cell histiocytosis) lower (e.g., cryptogenic fibrosing alveolitis, connective tissue disease, asbestosis, drug reactions)

  4. Usual interstitial pneumonia - Wikipedia

    en.wikipedia.org/wiki/Usual_interstitial_pneumonia

    There may be superimposed CT features such as mild ground-glass opacity, reticular pattern and pulmonary ossification. Probable UIP pattern: [4] Predominantly subpleural and basal; Often heterogenous distribution; Reticular pattern with peripheral traction bronchiectasis or bronchiolectasis; There may be mild ground-glass opacity; Indeterminate ...

  5. Halo sign - Wikipedia

    en.wikipedia.org/wiki/Halo_sign

    In A, axial CT scan of the chest showing a right lower lobe pulmonary nodule surrounded by areas of ground-glass opacity (the CT halo sign). In B, axial CT scan of the chest showing multiple, randomly distributed pulmonary nodules surrounded by the CT halo sign; the final diagnosis was aspergillosis. Differential diagnosis: temporal arteritis

  6. Lung nodule - Wikipedia

    en.wikipedia.org/wiki/Lung_nodule

    Ground glass opacity: No routine follow-up: CT after 6–12 months to check if persistent, then after 2 years and then another 2 years Part solid No routine follow-up: CT after 6–12 months: If unchanged and solid component remains <6mm: Annual CT for 5 years. Solid component ≥6mm: highly suspicious; Multiple nodules CT after 3–6 months.

  7. Cryptogenic organizing pneumonia - Wikipedia

    en.wikipedia.org/wiki/Cryptogenic_organizing...

    On high resolution computed tomography, airspace consolidation with air bronchograms is present in more than 90% of patients, often with a lower zone predominance. A subpleural or peribronchiolar distribution is noted in up to 50% of patients. Ground glass appearance or hazy opacities associated with the consolidation are detected in most patients.

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  9. Pneumonitis - Wikipedia

    en.wikipedia.org/wiki/Pneumonitis

    Clinical tests include chest radiography or (HRCT) which may show centrilobular nodular and ground-glass opacities with air-trapping in the middle and upper lobes of the lungs. Fibrosis may also be evident. Bronchoalveolar Lavage (BAL) findings coinciding with pneumonitis typically include a lymphocytosis with a low CD4:CD8 ratio. [7] [13]