A Case of Bizarre Parosteal Osteochondromatous Proliferation (Nora’s Lesion): A Brief Description

Abstract

Introduction. Nora’s lesion or bizarre parosteal osteochondromatous proliferation is a rare benign bone neoplasm that is usually localized on the small bones of the hands. The paper was aimed at clinical, morphological and structural analysis of Nora’s lesion case, the second registered in Ukraine. Case report. A 42-year-old male patient presented with complaints of painless swelling in the area of the distal 4th metacarpal bone and limited mobility of the ring finger. The diagnosis was based on a typical localization, combination of clinical, radiological, and histological methods; however, the right differential diagnosis was an important task in the present case, too. Conclusion. As there is still not enough data in the literature on this issue, further studies of Nora’s lesion etiology will improve its understanding, thus treatment modes and prevention of recurrence, too.Uvod. Norina lezija ili neobična periostalna osteohondromatozna proliferacija je retka benigna neoplazma kostiju koja obično zahvata male kosti šake. Cilj rada bila je klinička, morfološka i strukturalna analiza slučaja Norine lezije. To je drugi registrovani slučaj u Ukrajini. Prikaz slučaja. Četrdesetdvogodišnji pacijent se javio sa bolnim otokom u predelu distalne, četvrte metakarpalne kosti i sa ograničenom pokretljivošću domalog prsta. Dijagnoza je bazirana na tipičnoj lokalizaciji, kao i na kombinaciji kliničkih, radioloških i histoloških metoda. Takođe, prava diferencijalna dijagnoza bila je veoma važna u ovom slučaju. Zaključak. Budući da u literaturi još uvek nema dovoljno podataka o ovoj temi, dalje istraživanje etiologije Norine lezije će poboljšati razumevanje ovog problema, načine lečenja, kao i prevenciju recidiva.