Nora's lesion, a distinct radiological entity?

Objective To describe the radiological findings of “Bizarre parosteal osteochondromatous proliferation”(BPOP)—otherwise known as Nora’s lesion, to describe the natural evolution of BPOP and to assess radiologically if BPOP is indeed part of a spectrum of reactive lesions including florid reactive periostitis and turret exostosis.