Fig. 5From: Invasive inflammatory fibroid polyp of the stomach: a case report and literature reviewImmunohistochemical findings. Immunohistochemical findings revealing spindle cells stained positive for CD34 and smooth muscle actin but negative for CD117, DOG-1 and S100 protein. The Ki-67 labeling index was less than 1%. Scattered mast cells stained positive for CD117, but the spindle cells stained negative. Adipose tissue engulfed by the lesion stained positive for S100 protein, but the spindle cells stained negativeBack to article page