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KMID : 0613320040100020142
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Journal of the Korean Bone and Joint Tumor Soceity
2004 Volume.10 No. 2 p.142 ~ p.146
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Bizzare Parosteal Osteochondromatous Proliferation (Nora’s lesion) which affects Humeral Shaft -A Case Report-
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Lee Song
Kim Jin-Hak
Ji MK
Park Joon-Seong
Park KY
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Abstract
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Bizzare parosteal osteochondromatous proliferation is a rare lesion, tends to frequently recur. It was first described in 1983, when Nora and his colleagues reported 35 examples of a proliferative lesion involving small bones of the hand and the feet. It was regarded as occurring only in the small bones of the hand and the feet initially, but from then on, other authors have been reported cases including those involving long bones, skull and maxilla. We experienced a case of bizzare parosteal osteochondromatous proliferation which affects the humeral shaft in a 14-year-old male patient. Radiographs showed calcified mass measuring 4×3 cm in size and attached to the underlying cortex, which had a broad stalk base. Histologically, it showed hypercellular cartilage maturation to the trabecular bone and plump amount of fibrous stroma in the spaces around the bony trabeculae. Bizzare parosteal osteochondromatous proliferation is a relatively rare lesion, but has a recurrent behavior and histologically tends to be mistaken for malignancy. It can be treated by excision.
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KEYWORD
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Humerus, Bizzare parosteal osteochondromatous proliferation
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