Fig. 1From: HIF-1α expression in liver metastasis but not primary colorectal cancer is associated with prognosis of patients with colorectal liver metastasisImmunohistochemical staining of HIF-1α. a High expression of HIF-1α in a primary tumor, b low expression of HIF-1α in a primary tumor, c high expression of HIF-1α in a liver metastasis, and d low expression of HIF-1α in a liver metastasis. Scale bar, 100 μm. Magnification, × 400Back to article page