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Vertebral hemangiomas: MR imaging.

J S Ross, T J Masaryk, M T Modic

    Radiology
    |October 1, 1987
    PubMed
    Summary
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    Vertebral hemangiomas exhibit distinct high signal intensity on T1- and T2-weighted magnetic resonance (MR) images due to adipose tissue. This characteristic aids in differentiating vertebral hemangiomas from other bone lesions using MR imaging.

    Area of Science:

    • Radiology
    • Oncology
    • Pathology

    Background:

    • Vertebral hemangiomas are common benign vascular tumors of the spine.
    • Unlike most bone lesions, they typically present with increased signal intensity on T1- and T2-weighted magnetic resonance (MR) images.

    Purpose of the Study:

    • To investigate the underlying cause of the characteristic MR signal intensity in vertebral hemangiomas.
    • To correlate MR findings with radiographic, CT, and histopathologic data.

    Main Methods:

    • Retrospective review of MR imaging findings in ten vertebral hemangiomas.
    • Correlation with plain radiography, computed tomography (CT), and histopathologic studies.
    • Analysis of signal characteristics in both osseous and extraosseous components.

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    Main Results:

    • MR images revealed a mottled increased signal in the osseous portions of vertebral hemangiomas on T1- and T2-weighted images.
    • Adipose tissue, identified via chemical shift imaging and histology, was responsible for the high signal on T1-weighted images.
    • Extraosseous tumor components showed reduced or absent signal on T1-weighted images due to minimal adipose tissue content.

    Conclusions:

    • The presence of adipose tissue is the primary determinant of the increased T1-weighted signal in vertebral hemangiomas.
    • The distinct MR signal characteristics, particularly the T1-weighted hyperintensity in osseous components, are crucial for diagnosing vertebral hemangiomas.
    • MR imaging provides a specific constellation of findings for accurate vertebral hemangioma diagnosis.