Journal List > J Korean Orthop Assoc > v.43(2) > 1012774

Kim, Kim, Yang, Choy, and Ihm: Aberrant Chromosomal Alterations in Bizarre Parosteal Osteochondromatous Proliferation (Nora's Lesion) of Hand - A Case Report -

Abstract

Bizarre parosteal osteochondromatous proliferation is a disease similar to an osteochondroma that usually involves the metatarsal, metacarpal, proximal and middle phalanx. The symptoms are normally caused by the bone mass, the condition has a benign clinical course but recurrence is common. Recently, it was reported that there is a translocation between chromosome 1 and 17. We report a case of BPOP in the middle phalanx of hand with translocations and duplication in cytogenetic karyotyping with a review of relevant literature.

Figures and Tables

Fig. 1
Photographs showing a dorsoulnar bony mass located in the middle phalanx of the 4th finger.
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Fig. 2
Preoperative radiographs showing a 7×7 mm sized exostotic mass on the dorsoulnar aspect middle phalanx of the 4th finger. The protruding bony mass does not connect with the medullary cavity of middle phalanx.
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Fig. 3
Computed tomography scans showing an irregular and calcified mass of the middle phalanx.
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Fig. 4
Intraoperative photograph showing a whitish and irregular calcified mass.
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Fig. 5
Photomicrograph showing a bizarre chondrocyte, osteoid and spindle cells that favor bizarre parosteal osteochondromatous proliferation (BPOP).
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Fig. 6
Cytogenetic karyotyping showing t(3;17)(p21;p13), t(7;15)(q32;q15) and dup(15)(q15;q22).
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Fig. 7
Postoperative 12 months radiographs showing no evidence of local recurrence.
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