Expression of LGR-5 in two different tumours. Panel A: heterogeneous expression of LGR-5 inside a tumour in which positive (white arrow) and negative (red arrow) areas are present. Panel B: LGR-5 is expressed toward the luminal part. Original magnification 400x.
Femia et al. BMC Cancer 2013 13:48 doi:10.1186/1471-2407-13-48