FIG 3. Pathologic findings.

A, Microphotograph of the solid portion shows classic biphasic synovial sarcoma with glandular structures surrounded by a spindle cell component. The glandular structures have intraluminal eosinophilic secretions (Hematoxylin and eosin, x200).

B, Immunohistochemistry for cytokeratin highlights the epithelial elements. The spindle cell elements reveal focal cytokeratin immunoreactivity (cytokeratin [AE1/AE3], ABC method, x200).