Bony surface proliferations found in another site are typically given the generic diagnosis of bony exostosis or osteoma, i.e. are considered to be trauma-induced inflammatory periosteal reactions or true neoplasms. Unless such a bony prominence is specifically located, is pedunculated or is associated with an osteoma-producing syndrome such as the Gardner syndrome, there may be no means by which to differentiate an exostosis from an osteoma, even under the microscope.