Histological features of the fracture site in AFF patients; amorphous material (a) within the fracture gap (g) and woven bone (w) replacing old lamellar bone (L). AFF = atypical femoral fracture. Note. From “Histology of 8 atypical femoral fractures: remodeling but no healing,” by J. Schilcher et al, 2014, Acta Orthopaedica, 85, p. 280–6. Copyright 2014, Nordic Orthopaedic Federation. Reprinted with permission.