Cortico-medullary continuity in bizarre parosteal osteochondromatous proliferation mimicking osteochondroma on imaging

Leon D. Rybak*, Luigia Abramovici, Samuel Kenan, Martin A. Posner, Fiona Bonar, German C. Steiner

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

Bizarre parosteal osteochondromatous proliferation (BPOP), or Nora's lesion, is an unusual surface-based lesion of bone found most commonly in the hands and feet. In the original description of the lesion and in all publications that followed, one of the key imaging characteristics used to define this entity was the lack of cortico-medullary continuity with the underlying bone. The authors present 4 unique cases of pathologically proven BPOP in which cortico-medullary continuity with the underlying bone was demonstrated on imaging. It is believed that florid reactive periostitis, BPOP and turret osteochondroma may reflect points along the same continuum with trauma the likely inciting event. The authors suggest that, given this continuum, it may be possible to have BPOP lesions demonstrating overlapping imaging features with osteochondroma. If this is the case, strict adherence to the standard imaging criterion of lack of continuity between the lesion and the underlying bone may lead to misdiagnosis of these unusual cases of BPOP as osteochondromas.

Original languageEnglish
Pages (from-to)829-834
Number of pages6
JournalSkeletal Radiology
Volume36
Issue number9
DOIs
Publication statusPublished - Sep 2007
Externally publishedYes

Keywords

  • Bizarre parosteal osteochondromatous proliferation
  • CT
  • Florid reactive periostitis
  • MRI
  • Turret exostosis

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