In our case, because of the TLE1, EMA, CD99, and cytokeratin positivity and despite the lack of CD56 and bcl-2 expression which usually manifests in synovial sarcomas, we performed fluorescent in situ hybridization for the detection of the t(X;18) translocation, the absence of which excluded the possibility of the epithelial-type of synovial sarcoma [5]. The gene discussed is CD99; the disease is synovial sarcoma.