Colony-forming mesenchymal progenitor cells are reduced in BM of Apc^Min/+ mice. The numbers of clonogenic mesenchymal progenitor cells in a CFU-F assay are shown for mice of different ages. Numbers are shown as mean ± SEM. ^*P ≤ .1; ^**P ≤ .005; Student t test. n = 3 at 36 days and 63 days, n = 2 at 87 days.