抄録
A case of the giant osteoid osteoma is a 20-years old male who had complained of low back pain, especially at night for about last 6 months.
Rentgenogram showed an osteolytic lesion in the pars interarticularis of the 3rd lumbar vertebra. The lesion has not conventional nidus formation (Jaffe.), without any definite demarcation from the surrounding structures. After the surgical removal, he relieved his complaint. Recovery and postoperative course was very satisfactory. After curettage, the specimens were franular and gritty. On microscopic examination, highly vascularized osteogenic connective tissue and osteoid tissue were observed, and also the trabeculae of newly formed osseous tissue and the proliferation of osteoblast were recognized in them.
Clinically and rentgenologically our case is different in biological behaviour from conventional osteoid osteoma (Jaffe. Lichtenstein.) and belongs to the giant osteoid osteoma (Dahlin. and Johnson.)
