J Korean Foot Ankle Soc.  2013 Mar;17(1):68-73.

Bizarre Parosteal Osteochondromatous Proliferation (Nora's lesion) of the Big Toe. (A Report of Two Cases and Review)

Affiliations
  • 1Department of Orthopedic Surgery, Arthro-center, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea. uuhosksw@uuh.ulsan.kr
  • 2Department of Pathology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, Korea.

Abstract

Bizarre parosteal osteochondromatous proliferation (BPOP) is an rare benign tumor which involve mostly tubular bones of feet and hand. BPOP has clinical, radiographic, and histologic similarities with osteochondroma.Radiologically, BPOP has not central continuity with underlying osseous medulla. Histologically, the lesion has marked proliferative activity, and enlarged, bizzare, and binucleated chondrocytes.Despite the high risk of recurrence, treatment of choice is surgical resection. This report presents two cases of BPOP of the big toe with reviews of clinical, radiographic, and histological characteristics.

Keyword

Foot; Big toe; Bizarre parosteal osteochondromatous proliferation; BPOP; Nora's lesion
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