Concomitant Gastrointestinal Stromal Tumor of the Stomach and Gastric Adenocarcinoma in a Patient with Billroth 2 Resection

Figure 5

Immunohistochemical features of GIST: (a) S-100 negativity. Instead overexpressed in nerve cells (black arrow) —10x (b) SMA (smooth muscle actin) negativity. Instead overexpressed in muscular gastric wall cells (white arrow) —10x.

(a)

(b)