PMC4929395_01
The resected tumor: composed of spindle-shaped cells, hematoxylin and eosin stain, x20 (a); positive for KIT, x20 (b); positive for CD34, x20 (c); negative for S-100, x20 (d); and with a MIB-1 labeling index of 10%, x20 (e).
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F1
The resected tumor showed a GIST composed of spindle-shaped cells with positive staining for KIT and CD34 and negative staining for S-100; the mitotic count was 12 per 50 high-power fields, and the MIB-1 labeling index was 10% (fig. 1).