Fig. 6From: Neuroendocrine differentiation: a risk fellow in colorectal cancerImmunohistochemical staining of key proteins in the PI3K-Akt signaling pathway. A ErbB2-positive and negative staining (magnification x 100). First row, positive; second row, negative. B PIK3R1-positive and negative staining (magnification x 100). First row, positive; second row, negativeBack to article page