Bizarre Parosteal Osteochondromatous Proliferation (Nora’s Lesion) – One Case Report –

Journal of the Korean Society for Surgery of the Hand 2002;7(1):101-104.
Published online January 1, 2002.

Duke Whan Chung, Jae Hoon Lee, Sung Chul Bae

Bizarre Parosteal Osteochondromatous Proliferation (Nora’s Lesion) - 1례 보고 -

정덕환, 이재훈, 배성철

Abstract

Bizarre parosteal osteochondromatous proliferation was first described in 1983, when Nora and his collegues reported 35 examples of a proliferative lesion involving bone of the hands and the feet. In 1993, Meneses reported 65 cases of this condition. 72% of all the reported cases involved the small bones of the hands and feet. We report the case of a Bizarre parosteal osteochondromatous proliferation (Nora’s lesion) which occurred at the tip of the thumb in a 13-years-old female patient. The plain lateral X-ray demonstrates an round, calcified mass measuring 5×3 mm in size and attached to the underlying cortex. Histologically unevenly calcified bone and intervening fibrous stroma is seen. We report very rare Nora’s lesion occurred in distal phalanx of hand with references.