Properties of SW40 and T84 cells implanted subcutaneously or in the cecum wall. Serial sections of tumors grown after subcutaneous (a–c, g–i) or cecum implantation (d–f, j–l) of SW480 (a–f) or T84 (g–l) cells were stained with Harris solution (a, d, g, j) or immunolabeled with anti-CDX2 (b, e, h, k) or anti-β-catenin antibodies (c, f, i, l). Asterisks indicate the tumors. Arrowheads point to the cecum epithelium of the mouse host. Scale bars = 200 μm (a, d, g, j); 40 μm (b, c, e, f, h, i, k, l).