PMC4853146_01
(A) Chest computed tomography scans of focally cystic, low-density posterior mediastinal mass (extending to carina) that compresses trachea and esophagus; (B) 99TcmO4-tracer static imaging of normally positioned but indistinct thyroid gland; and (C) bronchoscopic images of visibly stenotic right airway suffering extrinsic mass effect.
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Its lower margin extended past aortic arch (Figure 1A). In the lower right lobe, tracer appeared abnormally concentrated, whereas very sparse distribution was evident in the upper pole of right lobe and in the left lobe (Figure 1B). Bronchoscopy disclosed visible stenosis of the right airway owing to extrinsic pressure (Figure 1C).
Microscopic views of large (10.5x7.2x4.5 cm) and fully encapsulated mass, diagnosed as hypervascular nodular goiter in ectopic thyroid tissue (hematoxylin and eosin stain).
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The examining pathologist documented a large (10.5x7.2x4.5 cm), fully encapsulated, and hypervascular nodular goiter (Figure 2) with cystic and solid areas.