CD34 and synovial sarcoma: An immunochemistry examination revealed the following results: EMA(+), Vim(+), S100(+), CD99(+), Ki-67(+), CD117(−), CD34(−), SAM(−), HMB(−), CK(−) and p53(−) (Figs. 4–7), confirming the lesion as a monophasic synovial sarcoma.