PMC2822252_01
A posteroanterior chest radiograph reveals increased radiolucency along with overinflated lung parenchyma and sparse vasculature in the upper half of the right lung. Also noted v-shaped branching opacity is in the right parahilar area (arrow). Pneumothorax is associated in the right lower pleural cavity (arrow head).
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F1
Pneumothorax was associated in the right lower pleural cavity (Fig. 1).
Chest CT scan shows a branching soft tissue density in the region of the posterior segment of the right upper lobe with marked decrease in attenuation and vascularity. The subsegmental branch of the posterior segmental bronchus could not be traced distal to this (arrow) posterior segmental bronchus.
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F2
The orifice of the posterior segmental bronchus was visualized but the orifice of the subsegmental branch of the posterior segmental bronchus could not be visualized separate from the origin (Fig. 2).
Microscopic findings of the posterior segment of the right upper lobe include subpleural bullae (arrows) which are surrounded by focally overinflated alveoli. (Hematoxylin-Eosin stainx12.5).
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F3
However the foci of the subpleural bullae in the overinflated segment were observed (Fig. 3).