PMC3112528_01
Chest X-ray AP (a) and lateral (b) views showing a large mediastinal mass (A).
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fig1
The trachea, significantly narrowed, was seen to be bowing anteriorly (Figures 1 and 2). 
CT scan (a) with coronal view (b) showing large posterior mediastinal mass (A) with tracheal compression.
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fig2
The trachea, significantly narrowed, was seen to be bowing anteriorly (Figures 1 and 2). 
The enucleated esophageal schwannoma was yellowish-white, smooth, and well-defined without any pedunculated portions.
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fig3
Gross examination of the esophageal mass revealed a smooth, multilobulated, but well-circumscribed mass measuring 8.5 cm in greatest dimension (Figure 3).
Histology of the esophageal mass upon resection. Microscopic examination of the esophageal mass revealed palisading spindled cells with dense chromatin, rare mitoses and scattered atypia (H&E, x100). Immunohistochemistry revealed the tumor to be positive for the S100 protein (not shown), confirming nerve sheath origin.
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fig4
Histologic examination of the mass revealed palisading spindled cells with scattered atypia, dense chromatin, and rare mitoses (Figure 4) in a background of prominent hyalinized vessels and a lymphoplasmacytic infiltrate.