• Title/Summary/Keyword: BPOP

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Bizarre Parosteal Osteochondromatous Proliferation (Nora's lesion) of the Big Toe (A Report of Two Cases and Review) (무지에 발생한 기괴성 방골성 골연골성 증식증 (2예 보고))

  • Kim, Sang Woo;Suh, Jae Hee;Shin, Seung Myeong;Cho, Bum Keun
    • Journal of Korean Foot and Ankle Society
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    • v.17 no.1
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    • pp.68-73
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    • 2013
  • 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.

Bizarre Parosteal Osteochondromatous Proliferation in the Proximal Phalanx of the Third Toe: A Case Report (제3족지 근위지골에 발생한 기괴성 방골성 골연골성 증식증: 1예 보고)

  • Noh, Haeng-Kee;Jeon, Ho-Seung;Jeon, Seung-Joo;Moon, Chan-Sam;Kang, Seo-Goo;Song, Gyung-Sub
    • The Journal of the Korean bone and joint tumor society
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    • v.17 no.2
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    • pp.91-94
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    • 2011
  • Bizarre parosteal osteochondromatous proliferation (BPOP) otherwise known as Nora's lesion, is a benign surface tumor of the small tubular bone of the hands and feet with high probability of local recurrence. The report of BPOP in the foot is very rare in our country. We report a case of BPOP of proximal phalanx of right $3^{rd}$ toe in 44-year-old female, successfully managed by en-bloc marginal excision with a review of the literatures.

Bizarre Parosteal Osteochondromatous Proliferation of the Proximal Phalanx of the Great Toe: A Case Report (무지 근위지골에 발생한 기괴 방골성 골연골성 증식증: 1예 보고)

  • Kim, Kyungil;Kim, Yu-Mi;Han, Weon-Cheol;Han, Byeol
    • Journal of Korean Foot and Ankle Society
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    • v.25 no.4
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    • pp.195-198
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    • 2021
  • Nora et al. first reported a bizarre parostealosteochondromatous proliferation (BPOP) as a small size bone malformation mainly in the foot and hand in April 1983 that was called Nora's lesion or Nora's disease. Nora's disease is known for its low incidence and is characterized as a benign lesion, without a malignancy or metastasis with different histological, radiological, and clinical features from other common lesions. Several cases of Nora's disease on the hand, foot, and long bone have been reported in Korea. This paper reports a case of BPOP of the proximal phalanx of the great toe.

Nora's Lesion in the foot (족부의 Nora 병변)

  • Kang, Ho-Jung;Cho, Nam-Hoon;Park, Jai-Hyun;Ha, Joong-Won
    • Journal of Korean Foot and Ankle Society
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    • v.2 no.1
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    • pp.48-51
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    • 1998
  • Bizarre parosteal osteochondromatous proliferation of bone (BPOP) was first described in 1983 by Nora et. al., who reported 35 cases of a bizarre proliferative lesion involving the small bones of the hands and less often the feet. These lesions simulate osteochondromas and conlain cartilage cap exhibiting atypical chondrocytes often undergoing ossification. Radiologically, they differ from osteochondromas. The lesion recurs in a significant number of cases after local excision, and the disturbing cytologic features may lead to a mistaken diagnosis of malignancy. The purpose of this report is to describe a case of bizarre parosleal osteochondromatous proliferation of the foot in a patient without traumatic history.

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