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  • Title: Radiologic diagnosis of osteoid osteoma: from simple to challenging findings.
    Author: Chai JW, Hong SH, Choi JY, Koh YH, Lee JW, Choi JA, Kang HS.
    Journal: Radiographics; 2010 May; 30(3):737-49. PubMed ID: 20462991.
    Abstract:
    Osteoid osteoma is characterized by an intracortical nidus with a variable amount of calcification, as well as cortical thickening, sclerosis, and bone marrow edema. When these findings are present, a diagnosis of osteoid osteoma is easily made. However, osteoid osteoma may display imaging findings that can be misleading, and it can be difficult to differentiate osteoid osteoma from other conditions such as infection, inflammatory and noninflammatory arthritis, and other tumors. In addition, stress fracture, intracortical abscess, intracortical hemangioma, chondroblastoma, osteoblastoma, and compensatory hypertrophy of the pedicle may mimic osteoid osteoma. To make the correct diagnosis, it is necessary to identify the nidus, and it is important to be familiar with the radiologic findings of osteoid osteoma and its mimics.
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