PMC4532116_01
Chest PA revealed well defined mediasthinal mass on the right paratracheal area.
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Chest CT scan revealed large multi-cystic mass lesion on the right paratracheal area which was attached to the lower pole of the right thyroid gland, displaced the superior vena cava anteriorly and extended to the level of the azygous vein.
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The mass is composed of several cystic lesions and yellow solid lesion resembling unexpanded lung tissue.
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The cyst wall shows a bronchial tissue which is composed of ciliated columnar epithelium, submucosal glands and cartilage (x100, H-E).
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