(I) 2D en face rendering of 3D reconstructed FIB-SEM images of tumor-stromal boundary (2–5 μM) from 12 week old MMTV-PyMT (WT), ubiquitous Ddr2-/- null; MMTV-PyMT, or Ddr2-/-; FSP1cre; MMTV-PyMT tumors. This evidence concerns the gene DDR2 and neoplasm.