Abstract

Bizarre parosteal osteochondromatous proliferation, also known as Nora's lesion, is relatively rare benign lesions that develop in small bones of hands and feet. In this study, one case of this disease in the proximal phalanx of the right index of a 42-year-old man has been reported. Physical exam and clinical characteristics, clinical, radio graphical and pathologic findings suggested the presence of this lesion. There was not any history of trauma and injury and in the exam, we find pain and swelling, mild local tenderness, extra osseous calcification in x-ray, and mass with high signal in T2 was observed. The mass was removed by surgery and observation showed no malignant manifestations. The patient did not show recurrence or complications after surgery.