Close
4X and 20X H&E images of pleural synovial sarcoma. (A) Histologically, on the scanning power the lesion shows alveolar ling tissue with the sarcoma. (B) On higher power the lesion show highly cellular spindle cells areas that are densely packed into an interwoven herringbone pattern.
Immunohistochemical studies showed tumor cell nuclear immunoreactivity for TLE-1 and focal immunoreactivity for cytokeratin and calretinin. It is negative for HMB-45, TTF-1, myogenin, desmin, and S100. These immunohistologic and cytological findings are compatible with those found in synovial sarcoma according to current literature.