“…These changes include cortical erosions (Cahir and Saifuddin, 2005;Chadwick, 1989;Flemming et al, 2003;Fritz et al, 1994;Hayes et al, 1987b), periosteal reactions, bone marrow extensions (Dürr et al, 1997;Flemming et al, 2003) and new bone formation (Chadwick, 1989), particularly woven bone (Hayes et al, 1987). Similar changes have been identified at fibrocartilaginous entheses (Chan et al, 2004), particularly (but not exclusively) in the rotator cuff (Diehl et al, 2011;Oliva et al, 2012;Porcellini et al, 2009;Uhthoff and Loehr, 1997). Therefore, this should be considered as a possible differential diagnosis for cortical erosions, periosteal reaction or new bone formation at or adjacent to either fibrous or fibrocartilaginous entheses, especially if these changes affect only one enthesis or an endocrine disease is suspected.…”