Nora’s Lesion

Abstract

Isolated primary bony lesions of the digits are infrequent. A phalangeal lesion in the hand is most likely to be benign. Rarely, however, primary benign tumour-like conditions affecting the handmay radiologically mimic an osteochondroma and histologically mimic a malignancy. We describe a case of bizarre parosteal osteochondromatous proliferation (Nora’s lesion, BPOP), which may do both and mislead the unsuspecting surgeon. The aim of this paper is to present our experience with this case, review existing literature and promote awareness among hand surgeons of a condition that can often be misdiagnosed.