N-cadherin upregulation in FD. (a) Positive control for N-cadherin staining in oral epithelium. (b) N-cadherin staining in epithelium of developmental odontogenic cyst and surrounding remodeling bone. (c) N-cadherin over-expression in osteoblasts lining osteoid in a case of pagetoid-type FD. (d) Magnification of osteoblasts expressing N-cadherin in FD. (e) A case of FD showing N-cadherin selectively expressed in osteoblasts without any expression in fibroblastoid cells. (f) A case of FD showing N-cadherin over-expression in fibroblastoid cells committed to inefficient osteoblast differentiation. Magnifications, ×4 (b,c), ×10 (e,f), ×20 (a,d).