CD34 and neoplasm: Among 19 tumor-bearing β-cateninlox(ex3)/+ mice, three had benign neoplasms, eight had malignant ones, and the remaining eight mice had both types of tumors according to hematoxylin-eosin (H&E), reticular fiber, and CD34 stainings (Fig. 1G and SI Appendix, Table S1).