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美国卫生研究院文献>BMC Musculoskeletal Disorders
>Bizarre parosteal osteochondromatous proliferation (Nora’s lesion) affecting the distal end of the ulna: a case report
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Bizarre parosteal osteochondromatous proliferation (Nora’s lesion) affecting the distal end of the ulna: a case report
BackgroundBizarre parosteal osteochondromatous proliferation (BPOP), first described by Nora et al. in 1983 and therefore termed “Nora’s lesion”, is a rare lesion that occurs in the short bones of the hands and feet and eventually presents as a parosteal mass. Reports of BPOP in the long bones are very rare. A benign disease, BPOP does not become malignant, although a high rate of recurrence following surgical resection is reported. Because of its atypical imaging findings and histopathological appearance, a BPOP might be misdiagnosed as a malignant tumor such as an osteochondroma with malignant transformation, a parosteal osteosarcoma, or a periosteal osteosarcoma.
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