Fig. 2.

FISH analysis of formalin-fixed, paraffin-embedded (FFPE) sections of a pair of primary breast tumor (A and B) and corresponding sentinel lymph node metastasis (C and D) showing hybridization for the BP1 (green signals) and HER2/NEU (red signals) genes. Note the detection of increased copy number for both genes in both of the lesions (100x; magnification bar is 100 μm).