Hands, especially lunatum, are involved very rarely with osteoid osteoma. This report presents an osteoid osteoma of the lunatum, which was previously misdiagnosed as Kienböck's disease and had undergone surgery. Magnetic resonance imaging may lead the clinician to misdiagnose because of the excessive bone edema around the carpus. The operation should be planned according to radiography and com...

A case of intracortical haemangioma in the tibial diaphysis is reported. The radiological and macroscopic features were identical with osteoid osteoma. In view of this similarity, haemangiomata, despite their rarity at this site, must be considered in the differential diagnosis of osteoid osteoma.

background : the hand and wrist bones are infrequent sites for osteoid osteoma, and its diagnosis can be difficult. this paper reports 25 cases of osteoid osteoma in the hand and wrist.   methods : records of the 25 patients who had pathological conditions of osteoid osteoma of the hand and wrist were reviewed and analyzed.   results : twenty-five cases of osteoid osteoma of the hand and wrist ...

Of 197 cases of canine oral malignant melanoma, 29 cases with myxoid, cartilage, and osteoid formation were studied pathologically and immunohistochemically. Tumor tissues were classified into spindle cell type (13 cases), epithelioid cell type (1 case), and mixed type (15 cases). Myxoid matrixes (29 tumors) were formed mainly in the tissues of spindle cell type and were positive for Alcian blu...

Osteoid osteoma is a benign osteoblastic bone tumor that is usually encountered in adolescent and young adult males (1). The typical findings of osteoid osteoma in a long tubular bone are the presence of a small, well-defined radiolucent lesion with or without mineralization within the cortex, associated with cortical thickening and reactive sclerosis (2). Osteoid osteomas can be categorized ac...

Osteoid osteoma is a relatively common osteoblastic lesion of benign skeletal neoplasms and occurs most commonly in the cortex of long bones, especially the femur and the tibia. Radiological characteristics are a nidus that appears as a small, relatively radiolucent zone within an area of extensive reactive sclerosis. Clinically, the lesion presents with increasing pain, is worse at night, and ...