A Rare Case of Osteoid Osteoma in Second Sacral Arch.

摘要

ABSTRACT The name Osteoid Osteoma was first proposed by Jaffe to designate a benign condition of the bone characterized by the formation of a nidus of vascularized osteoid tissue with sclerosis of surrounding bone7. The incidence of osteoid Osteoma in vertebrae is about 0-25% with average of about 10%6.Patients with Osteoid Osteoma complain of a typical history of pain at night, subsiding on consuming salicylates or NSAIDS. Our patient had a history of chronic back pain more at night associated.