Monophasic Epithelial Synovial Sarcoma Accompanied by an Inverted Papilloma in the Sphenoid Sinus

<table>Atypical proliferate epithelial cells arranged like irregular glands (as in adenocarcinoma) and distributed among a fibrous substance. Atypical proliferate epithelial cells are immunoreactive for CD99 (insert). (Hematoxylin-eosin stain; original magnification ×200) (insert ×400).</table>

Case Reports in Medicine

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Figure 2

Figure 2: Monophasic Epithelial Synovial Sarcoma Accompanied by an Inverted Papilloma in the Sphenoid Sinus 