Pten-deficient telocytes and ApcMin/+mutation increases adenoma multiplicity but not epithelial transformation in mice. Total (A) colonic polyps and (B) adenomas were counted from 75-day-old ApcMin/+, PtenΔFoxl1+, and PtenΔFoxl1+;ApcMin/+ mice. (C) Histologic assessment showed an increase of adenoma multiplicity in PtenΔFoxl1+;ApcMin/+ when compared with ApcMin/+ colons (N = 6 and 5, respectively). Asterisks indicate adenomatous polyps. (D) All ApcMin/+ polyps were assessed histologically as adenomas. (D) Adenomas, (E) lymphoid aggregates, and (F) a mixed adenoma were found in PtenΔFoxl1+;ApcMin/+ colons. Data are expressed as means ± SEM. Mann–Whitney U test: **P ≤ .01, ***P ≤ .001, and ****P ≤ .0001. Scale bars: (A) 1 mm, (D–F) 500 μm.