PMC4510255_01
CT thorax sagittal image showing hypodense lesion in the left lower lobe posteriorly with resolving infiltrates within. Arrow: pulmonary vein branch.
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fig1
CT angiogram of thorax showed 9 cm well-defined area of low attenuation in the left lower lobe (Figure 1) with infiltrates inside.
CT angiography shows dedicated pulmonary artery and vein supplying the hypolucent area. Small cysts can be appreciated within the hypolucent area.
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fig2
This lesion demonstrated a dedicated pulmonary artery and pulmonary vein (Figure 2); these vessels were emerging from the hilar region.
CT scan 4 months ago showing infiltrates in the left lower lung.
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fig3
Review of previous chest X-rays and computed tomography (CT) of the thorax from the time of his previous episodes of pneumonia revealed various degrees of consolidation in left lower base in this particular area (Figure 3).
Gross photograph showing multiple air filled microcysts at periphery of lung (white arrow) and a larger cyst (black arrow).
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fig4
On gross examination, a relatively well-demarcated lesion with a 1.5 x 1.5 cm thin walled cyst with inspissated mucus within and multiple air filled microcysts at the peripheral aspect of the cyst was noted (Figure 4).
Higher power view of largest cyst (black arrow) showing columnar ciliated epithelium and adjacent smaller cyst (white arrow) with similar lining.
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fig5
Microscopic examination revealed larger cyst with columnar ciliated epithelium (Figure 5) and dispersed bronchiole-like structures within the alveolated parenchyma (Figure 6).
Numerous bronchiole-like structures (black arrows).
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fig6
Microscopic examination revealed larger cyst with columnar ciliated epithelium (Figure 5) and dispersed bronchiole-like structures within the alveolated parenchyma (Figure 6).