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[MRI features of 13 cases of intracranial ependymoma]
1Diagnostic Imaging Center, Nanfang Hospital, First Military Medical University, Guangzhou, 510515. qsj@fimmu.com
Objective:
To improve the accuracy of qualitative diagnosis of intracranial ependymomas by analyzing their magnetic resonance (MR) images.
Methods:
The MR images of 13 cases of intracranial ependymomas confirmed by pathological examinations were investigated retrospectively.
Results:
In the 10 cases of ventricle ependymomas, the tumors were identified in the fourth ventricle in 3 cases and in the lateral ventricle in 7 cases. The T(1)-weighted MR images presented isointense or hypointense signals and T(2)-weighted images showed inhomogeneous hyperintense ones. No edema occurred around these tumors, and the contrast-enhanced scans presented inhomogeneous enhancement. In the other 3 cases of ependymomas in the brain parenchyma, including 2 cases of supratentorial and 1 subtentorial ependymomas. The tumor parenchyma presented hypointense signals in T(1)-weighted MR images as compared to the signals of the brain parenchyma, and in T(2)-weighted images, the signals intensities were similar to or higher than those of the gray matter. Mild edema could be seen around the tumors. Enhanced scans of the tumor parenchyma showed mild to moderate enhancement.
Conclusion:
MR examination may help in the preoperative detection of intracranial ependymomas.
Insights
Magnetic resonance (MR) imaging aids in diagnosing intracranial ependymomas. Analysis of MR images reveals distinct patterns for ventricle and brain parenchyma tumors, improving diagnostic accuracy.
Area of Science:
- Neuroimaging
- Oncology
- Pathology
Context:
- Intracranial ependymomas are a type of brain tumor.
- Accurate preoperative diagnosis is crucial for effective treatment planning.
- Magnetic resonance (MR) imaging is a key diagnostic tool in neuro-oncology.
Purpose:
- To enhance the accuracy of qualitative diagnosis for intracranial ependymomas.
- To analyze characteristic features of intracranial ependymomas on MR images.
- To differentiate between ependymomas located in the ventricles versus brain parenchyma.
Summary:
- Retrospective analysis of 13 pathologically confirmed intracranial ependymomas using MR imaging.
- Ventricle ependymomas (10 cases) showed specific signal intensities on T1- and T2-weighted images, with no surrounding edema.
- Brain parenchyma ependymomas (3 cases) exhibited different signal characteristics and mild surrounding edema on MR imaging.
Impact:
- MR imaging findings can aid in the preoperative detection and characterization of intracranial ependymomas.
- Improved diagnostic accuracy through detailed MR image analysis can guide surgical and therapeutic decisions.
- This study contributes to the understanding of MR imaging features for differentiating ependymoma subtypes.
