Fig 1: Lymph node and pulmonary metastases. (a) Metastatic tumor cells identified using cytokeratin (red) and CD326 (green) in axillary lymph nodes from PyMT and PyMTΔsEH (ΔsEH) mice, bar = 200 µm (upper panels) 20 µm (lower panels); n = 16–17 animals per group. (b) Breast cancer metastases (HE staining), metastasis number and size in lungs from PyMT and PyMTΔsEH (ΔsEH) mice; bar = 1 mm. The inserts show magnifications of the areas marked by boxes; n = 16 animals per group with 5 sequential slides evaluated per sample.