Case RepositoryBizarre Parosteal Osteochondromatous Proliferation (Nora Lesion) in Pediatric Phalanges
Section snippets
Case 1
A 12-year-old boy presented with a painless mass on the middle phalanx of his right middle finger (Fig. 1). The patient was otherwise in good health, was on no medications, and had no significant past medical history. There was a history of trauma 6 months previously while playing at school. On physical examination, he had a lobulated lesion along the middle phalanx of the right middle finger. It was 3 cm in diameter and extended from the radial to the volar aspect of the finger. Radiographs
Discussion
Bizarre parosteal osteochondromatous proliferation is an uncommon benign reactive lesion that arises from the periosteum through a process of cartilaginous metaplasia. The age distribution of cases reported in the literature ranges from 8 to 74 years with most cases occurring in the 20s and 30s1, 2, 3 without sex predilection. We report 3 cases between the ages of 2 and 12 in this series, all arising in the middle or proximal phalanx. In approximately three-quarters of all cases of BPOP, the
Acknowledgements
The authors of this study wish to thank Marybeth Ezaki, MD, for her invaluable assistance with the manuscript preparation and submission.
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