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Imaging of cranial chordomas.
T C Larson1, O W Houser, E R Laws
1Department of Diagnostic Radiology, Mayo Clinic, Rochester, MN 55905.
Mayo Clinic Proceedings
|October 1, 1987
Summary
Magnetic resonance imaging (MRI) is the best diagnostic tool for clival chordomas, offering superior visualization of soft tissues and critical structures. However, computed tomography (CT) remains essential for detecting calcifications and bone destruction.
Area of Science:
- Neuroradiology
- Oncology
- Medical Imaging
Background:
- Clival chordomas are rare bone tumors originating from notochordal remnants.
- Accurate diagnosis and staging are crucial for effective treatment planning.
Purpose of the Study:
- To evaluate the diagnostic performance of magnetic resonance imaging (MRI) for clival chordomas.
- To compare MRI with other imaging modalities, including computed tomography (CT).
Main Methods:
- Retrospective analysis of 14 patients with clival chordomas.
- Comparison of MRI findings with skull series, tomography, CT, and magnification angiography.
- Detailed assessment of imaging characteristics, including signal intensity and spatial relationships.
Main Results:
- MRI demonstrated high sensitivity for detecting clival chordomas.
- MRI excelled in visualizing soft-tissue contrast and the relationship between the tumor and vital structures (brainstem, cranial nerves, vessels).
- CT provided superior visualization of tumoral calcification and osseous destruction, which are limitations of MRI.
Conclusions:
- MRI is the optimal single imaging modality for diagnosing clival chordomas due to its multiplanar capabilities and soft-tissue contrast.
- CT remains valuable for identifying calcifications and bone erosion, complementing MRI findings.
- Integrated use of MRI and CT ensures comprehensive evaluation of clival chordomas.