Figure 2:Immunohistochemical staining of GIST gastric mucosa specimens. Immunohistochemical staining of GIST gastric mucosa specimens with alkaline phosphatase - anti-alkaline phosphatase (APAAP).CD117 positive expression in tumor cells at (A) magnification (x20) and (B) x400 (same specimen). (C) Positive staining for CD 34 (x100). (D) Ki-67 (x400) staining