title: Distinct chromosomal rearrangements in subungual (Dupuytren) exostosis and bizarre parosteal osteochondromatous proliferation (Nora lesion).
abstract: BACKGROUND
  Proliferative lesions of the bone surface, such as subungual (Dupuytren) exostosis and bizarre parosteal osteochondromatous proliferation (BPOP, Nora lesion) are currently classified as reactive, proliferative processes that mimic primary neoplasms of bone.
  
  
  METHODS
  Cytogenetic analysis was performed on 3 subungual exostoses of the great toe and 2 BPOP lesions of the radius and ulna.
  
  
  RESULTS
  A balanced translocation t(X;6) was identified in all cases of subungual exostoses. The chromosomal rearrangements observed in 1 case of BPOP differed from those seen in subungual exostosis.
  
  
  CONCLUSIONS
  The presence of chromosomal abnormalities in subungual exostosis and BPOP suggests that these lesions are neoplastic, with a different molecular pathogenesis, and that each is a distinct clinicopathologic entity.
authors.affiliation: Department of Pathology, Children's Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA.
authors.forename: Eduardo
authors.initials: E
authors.lastname: Zambrano
authors.forename: Vânia
authors.initials: V
authors.lastname: Nosé
authors.forename: Antonio R
authors.initials: AR
authors.lastname: Perez-Atayde
authors.forename: Mark
authors.initials: M
authors.lastname: Gebhardt
authors.forename: M Timothy
authors.initials: MT
authors.lastname: Hresko
authors.forename: Paul
authors.initials: P
authors.lastname: Kleinman
authors.forename: Kathleen E
authors.initials: KE
authors.lastname: Richkind
authors.forename: Harry P W
authors.initials: HP
authors.lastname: Kozakewich
mesh_terms: D000293:Adolescent; D001859:Bone Neoplasms / Q000235:genetics* / Q000473:pathology / Q000601:surgery; D002648:Child; D002675:Child, Preschool; D002896:Chromosomes, Human, Pair 6; D041321:Chromosomes, Human, X; D005260:Female; D006214:Hallux / Q000473:pathology; D006801:Humans; D008297:Male; D015831:Osteochondroma / Q000235:genetics* / Q000473:pathology / Q000601:surgery; D032681:Spectral Karyotyping; D014178:Translocation, Genetic / Q000235:genetics*