Figure 3.

Immunohistochemistry analysis of tumor tissue. (A) Ki67 =10% after neoadjuvant chemotherapy (magnification ×10); (B) by immunohistochemistry, cells were positive for CD117 (magnification ×10); (C) tumor cells were also positive for synaptophysin (magnification ×10); (D) chromogranin positive staining is clearly evident in this tumor sample (magnification ×10).