Fig. 4From: Pentixafor PET/CT for imaging of chemokine receptor 4 expression in esophageal cancer – a first clinical approachImmunohistochemistry: CXCR4 (both photos in same magnification: 200x) coloring in (a) squamous cell carcinoma: (long arrow) is strong positive for CXCR4 (CXCR4 positive inflammatory cells marked with short arrow); and (b) adenocarcinoma (with signet ring cell features; long arrow) scored as negative (less than three CXCR4 positive cells in high power field/HPF; one CXCR4 positive cell marked with short arrow)Back to article page