Lung Consilidation, Ground Glass Shadowing, Obstructive Emphysema, Collateral Air-draft, Mucocoeles, patterns of Collapse, Lung Torsion and Herniation.

With infection occurring distal to an endobronchial block, this will tend to block the interalveolar and other intra-pulmonary connections and stop collateral air drift so the lung opacity will increase, with further loss of volume retained secretions and lung consolidation. Infection may also give rise to bronchitis, a broncho-pneumonia, segmental or lobar consolidation, local infiltration, nodules, etc. On high K.V radiographs one should normally be able to see the air-tilled trachea, the carina, the main, lobar and intermediate bronchi. Air bronchograms may also be seen on plain radiographs, conventional tomograms and CT sections with congestion, infarction, intrapulmonary bleeding, bronchiolo-alveolar carcinomas, pulmonary lymphomas, Wegener's granuloma, some florid sarcoid infiltrations, etc.