PMC4873028_01
The chest computed tomographic image shows a 2-cm, solid, clearly margined mass that mimicked station #2R lymph node swelling. The 18F-fluorodeoxyglucose (FDG) positron-emission tomography/computed tomographic image shows the single, moderate FDG uptake to the mass. The maximum standardised uptake value (SUV max) is 3.2 in both the early (A) and delayed phases (B).
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Patient 1 was a 56-year-old woman who presented with a 22 x 17 mm, non-symptomatic, solid mass in the right upper paratracheal space, which was detected by chance. 18F-Fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG-PET/CT) demonstrated solitary FDG uptake to the mass, with a maximum standardised uptake value of 3.2 both in the early and delayed phases (Fig. 1).
Resected specimen of the right paratracheal tumour (A: macroscopic, not fixed; B: macroscopic, fixed; and C: microscopic). The histologically confirmed benign schwannoma consists of Antoni type A and B spindle cells.
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Attention was paid to preserve the right recurrent laryngeal nerve (Fig. 2).
PMC4873028_02
Chest computed tomographic image showing the 55- x 41-mm cystic mass in the left upper paratracheal space that extensively compressed and dislocated the trachea toward the right. The mass is incarcerated between the trachea and aortic arch.
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The large cystic mass was incarcerated between the trachea and aortic arch (Fig. 3).
Resected specimen of the left paratracheal cyst (A: macroscopic; B: microscopic, haematoxylin-eosin stain; C: microscopic, AE3/AE5 stain; and D: microscopic, CK19 stain). Histological assessment confirmed a parathyroid cyst with parathyroid tissue that was immunohistochemically positive for AE3/AE5 and CK19 in its surrounding tissue.
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Histological assessment confirmed a parathyroid cyst with parathyroid tissue that was immunohistochemically positive for AE3/AE5 and CK19 in its surrounding tissue (Fig. 4).