SYP and neoplasm: Immunohistochemical staining revealed the tumor cells are positive with vimentin, PCK, CD117, β-catenin, synaptophysin, S-100, P53 (Fig. 4), while negative with PLAP, Her-2, CD99, EMA, CR, α-inhibin, chromogranin A, Melan A. Ki-67 was 10%.