Ma L D, Frassica F J, Scott W W, Fishman E K, Zerbouni E A
Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins Medical Institutions, Baltimore, MD 21287, USA.
Radiographics. 1995 Mar;15(2):349-66. doi: 10.1148/radiographics.15.2.7761640.
Magnetic resonance (MR) imaging is the most sensitive and accurate imaging technique for evaluation of musculoskeletal tumors. With increasing clinical experience, however, an overlap between the classic characteristics of benign and malignant tumors is frequently observed. In a prospective analysis of 87 consecutive cases of musculoskeletal tumors, the malignancy of skeletal lesions was correctly assessed with MR imaging in 55% of the cases. In 39% of the cases, the malignancy of skeletal lesions was overestimated with MR imaging. Correlation with plain radiography is extremely important in such cases and would have resulted in correct assessment of 73% of the skeletal lesions. For soft-tissue lesions, a large variability is found in the benign versus malignant appearances of lesions on MR images, with poor correlation between classic benign characteristics and the benignity of the lesion (17% of cases). The exceptions are hemangiomas and lipomas, which have characteristic appearances on MR images. Knowledge of potentially misleading appearances of musculoskeletal tumors on MR images allows more accurate diagnosis of such tumors.
磁共振（MR）成像术是评估肌肉骨骼肿瘤最敏感、最准确的成像技术。然而，随着临床经验的增加，经常观察到良性和恶性肿瘤的典型特征存在重叠。在对87例连续的肌肉骨骼肿瘤病例进行的前瞻性分析中，通过MR成像正确评估了55%的骨骼病变的恶性程度。在39%的病例中，MR成像高估了骨骼病变的恶性程度。在这种情况下，与X线平片的相关性极其重要，这将使73%的骨骼病变得到正确评估。对于软组织病变，MR图像上病变的良性与恶性表现差异很大，典型良性特征与病变良性之间的相关性很差（17%的病例）。血管瘤和脂肪瘤是例外，它们在MR图像上有特征性表现。了解MR图像上肌肉骨骼肿瘤可能产生误导的表现有助于更准确地诊断此类肿瘤。
