title: [Bizarre parosteal osteochondromatous proliferation (Nora's lesion): two cases].
abstract: The lesion Nora described in 1983 as a bizarre parosteal osteochondromatous proliferation (BPOP) is a member of a group of osteocartilaginous surface lesions. BPOP is infrequent but new cases are regularly reported. We report two new cases with an unusual localization (ilion and distal humerus) and unusual size (9 cm for the iliac lesion). In light of these cases and reports in the literature, the main differential diagnoses of BPOP are exostosis and parosteal osteosarcoma.
authors: Service de Chirurgie Orthopédique et Traumatique, hôpital Cochin, 27, rue du Faubourg-Saint-Jacques, 75679 Paris Cedex 14. soubeyrand.marc@wanadoo.fr
authors: M
authors: M
authors: Soubeyrand
authors: G
authors: G
authors: de Pinieu
authors: D
authors: D
authors: Biau
authors: P
authors: P
authors: Anract
authors: B
authors: B
authors: Tomeno
mesh_terms: D000328:Adult; D001859:Bone Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D001860:Bone Plates; D003937:Diagnosis, Differential; D005096:Exostoses / Q000175:diagnosis / Q000000981:diagnostic imaging; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006811:Humerus / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D007085:Ilium / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D008279:Magnetic Resonance Imaging; D008297:Male; D015831:Osteochondroma / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D012516:Osteosarcoma / Q000175:diagnosis / Q000473:pathology; D010521:Periosteum / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery; D013997:Time Factors; D014057:Tomography, X-Ray Computed