Primary Intraosseous Synovial Sarcoma with Molecular Confirmation: Expanding and Clarifying the Spectrum of This Rare Neoplasm

Figure 4

Case 1: H&E-stained core needle biopsy material (a) and associated immunohistochemistry results demonstrating diffuse membranous positivity for CD99 (b) and focal positivity for EMA (c). CD34 highlights the vasculature of the tumor and is negative in tumor cells (d). The tumor cells are also negative for pankeratin AE1/3 (e) and STAT6 (f).

(a)

(b)

(c)

(d)

(e)

(f)