Zanetti M, Eberhard S M, Exner G U, von Hochstetter A, Hodler J
Abteilung Radiologie, Orthopädische Universitätsklinik Balgrist, Zürich.
Praxis (Bern 1994). 1997 Mar 11;86(11):432-6.
The purpose of this evaluation was the description of potentially misleading MR appearances of osteoid osteoma. The MR images of 10 patients with osteoid osteoma were retrospectively evaluated and compared to radiographic, intraoperative and histologic findings. 4 of the 10 abnormalities were located in the proximal femur, two in the lumbar spine, and one each in the tibial plateau, in the cervical spine, in the sacrum and in the first metacarpal. 8 of the 9 nidi visible on standard radiographs and/or CT scans were demonstrated on MR images. Edema was visible within the bone marrow in 3, within soft tissue in 2 and in both locations in 4 MR examinations. The soft tissue abnormalities were circumscribed in 3 patients and could be misdiagnosed as soft tissue tumors or an abscess in these patients. One of 5 osteoid osteomas located in the proximity of a joint mimicked septic arthritis. The MR appearance of osteoid osteoma may be misleading. However, false diagnoses usually can be avoided with a careful search of a nidus. MR imaging in osteoid osteoma is important for differential diagnosis.
本评估的目的是描述骨样骨瘤可能具有误导性的磁共振成像（MR）表现。对10例骨样骨瘤患者的MR图像进行回顾性评估，并与X线、术中及组织学检查结果进行比较。10处病变中，4处位于股骨近端，2处位于腰椎，胫骨平台、颈椎、骶骨及第一掌骨各1处。在标准X线片和/或CT扫描上可见的9个瘤巢中，8个在MR图像上显示。在3例MR检查中，骨髓内可见水肿，2例软组织内可见水肿，4例两者均可见。3例患者的软组织异常边界清晰，在这些患者中可能被误诊为软组织肿瘤或脓肿。位于关节附近的5例骨样骨瘤中有1例类似化脓性关节炎。骨样骨瘤的MR表现可能具有误导性。然而，通过仔细寻找瘤巢通常可以避免误诊。MR成像对骨样骨瘤的鉴别诊断很重要。
