PMC3754399_01
Figure 1: Plain Radiograph of the chest showing a 10 x 10cm opacity in the right lower zone of lung.
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F1
She had been investigated elsewhere and the initial chest x-ray showed a 10x10 cm cyst in the right lower zone (Fig. 1).
Figure 2: CT thorax showing an 8.5 x 7.5 x 6.5 cm air-filled cavitary lesion with detached dependent wavy membrane in the right lower zone of lung consistent with hydatid cyst.
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F2
Contrast enhanced CT scan thorax revealed an 8.5x7.5x6.5 cm air-filled cavitary lesion with detached dependent wavy membrane in the lower lobe of right lung with collapse / consolidation of the adjacent lung parenchyma (Fig. 2).
Figure 3 (a): Photomicrograph showing a large cyst lined by columnar epithelium with small glandular structures in the inflamed wall (H/E x 100), (b): cyst lined by tall columnar epithelium (H/E x 250), (c): laminated wall of the hydatid cyst (H/E x 400), (d): dense inflammation in the pericyst with entrapped adenoid structures lined by tall columnar epithelium consistent with CCAM type 2 (H/E x 400).
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F3
In addition, there were features of CCAM type 2 in the adjacent lung parenchyma (Fig. 3a-d).