Parosteal bone tumors involving the small bones of the hand and the foot are rare. Their clinical and imaging features may imitate other bone tumors, leading to incorrect diagnosis and management. Histological examination of the lesion will establish the correct diagnosis. Bizarre parosteal osteochondromatous proliferation was first described in 1983 by Nora et al.1 In a report of 35 Mayo Clini...

The case of a 34-year-old man with a fast growing hard lump on the fourth digit of the right hand is presented. Radiography and MRI of the finger showed the radiologic characteristics of a bizarre parosteal osteochondromatous proliferation. Pathologic analysis confirmed the radiologic diagnosis.

INTRODUCTION There have been fewer than 150 cases of Bizarre Parosteal Osteochondromatous proliferation (Nora Lesions) reported in the literature to date and no significant reports on angular deformities caused by this lesion. Nora's lesion can easily be misdiagnosed as osteochondroma or chondrosarcoma and therefore inappropriately managed. Although this condition classically appears in the sec...

Bizarre parosteal osteochondromatous proliferation is a rare benign condition of locally aggressive and often recurrent osteochondromatous exostosis arising from the bony cortex. We present a case of a patient who presented with this lesion in her tibia, focusing on imaging findings. Because of the lack of information on the disease's natural history, etiology, and clinical course, a multidisci...

A case of a left small finger tumour that was diagnosed on histopathological review as Nora's lesion (bizarre parosteal osteochondromatous proliferation) is reported. There have been fewer than 150 cases reported in the literature to date and its pathophysiology is yet to be defined. Due to its rare presentation, Nora's lesion can easily go unrecognized and therefore inappropriately managed.