PMC5241500_01
Thoracic computed tomography image showing an intensely enhanced lesion in the posterior superior mediastinum within the prevascular space.
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fig1
Contrast-enhanced computed tomography imaging of her chest revealed a posterior superior mediastinal lesion with an area of approximately 2.7 x 1.3 cm (Figure 1) and a value of approximately 122 HU.
(a) Interrupted stitches using 4-0 Prolene. (b) Reinforcement with a pedicled pleural flap.
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fig2
It was further reinforced with a pedicled pleural flap to avoid small amounts of air from leaking from the suture line (Figure 2).
Histopathology showed that the tumor cells exhibited a sheet-like growth pattern with abundant eosinophilic cytoplasm and round nuclei. (a) Original magnification, 100x. (b) Original magnification, 400x. Immunohistochemistry for (c) SMA and (d) h-cald was positive.
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fig3
Immunohistochemistry demonstrated that the cells were positive for SMA (smooth muscle actin) and h-cald and negative for CD34, Desmin, HMB45, CK, Syn, and S100 (Figure 3).